Journals
Advanced Photonics
Photonics Insights
Advanced Photonics Nexus
Photonics Research
Advanced Imaging
View All Journals
Chinese Optics Letters
High Power Laser Science and Engineering
Articles
Optics
Physics
Geography
View All Subjects
Conferences
CIOP
HPLSE
AP
View All Events
News
About CLP
Search by keywords or author
Login
Registration
Login in
Registration
Search
Search
Articles
Journals
News
Advanced Search
Top Searches
laser
the
2D Materials
Transformation optics
Quantum Photonics
Home
About
Early Posting
Current Issue
Issue in Progress
Special Issues
All Issues
Special Events
Journals >
Chinese Optics Letters
Contents
2003
Volume: 1 Issue 1
19 Article(s)
Select format
EndNote (RIS)
BibTex
Plain Text
Export citation format
Fiber Optics and Optical Communications
NOLM-based wavelength conversion with FBG band-pass filter for optical packet switching
Min Zhang, Peida Ye, Fan Zhang, Yongpeng Zhao, and Jian Wang
Nonlinear-optical-loop-mirror-based wavelength conversion is studied in details. A set of two-phase-shifted Bragg gratings are introduced into the coverter, serving as a narrow band-pass filter to remove new frequencies generated by walk-off and to compensate the dispersion. Numerical simulations are performed to valid
Nonlinear-optical-loop-mirror-based wavelength conversion is studied in details. A set of two-phase-shifted Bragg gratings are introduced into the coverter, serving as a narrow band-pass filter to remove new frequencies generated by walk-off and to compensate the dispersion. Numerical simulations are performed to validate our method. The results show that the converted pulses after the filter are reshaped and, sometimes, even compressed..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0103 (2003)
Get PDF
View fulltext
Wavelength switching in a mixed structure of a long-period and a Bragg fiber gratings
Chih-Nan Lin, Yean-Woei Kiang, and C. C. Yang
We built a numerical model for evaluating the coupling processes of a mixed structure of a Bragg fiber grating and a long-period grating. From the numerical results, we not only confirmed the wavelength switching phenomena observed in previously reported experiments, but also discovered a new coupling mechanism, which
We built a numerical model for evaluating the coupling processes of a mixed structure of a Bragg fiber grating and a long-period grating. From the numerical results, we not only confirmed the wavelength switching phenomena observed in previously reported experiments, but also discovered a new coupling mechanism, which generated the reflection of a signal with its wavelength longer than the Bragg wavelength. The dependencies of the wavelength switching behaviors on various parameters of the mixed grating structure were demonstrated. Such results should be useful for optimizing the design of such a potentially useful fiber component..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0106 (2003)
Get PDF
View fulltext
Study on the 4*10 Gb/s, 400 km dispersion compensation by chirped optical fiber grating
Li Pei, Tigang Ning, Wei Jian, Tangjun Li, and Shuisheng Jian
In this paper, the dispersion compensation for 4*10 Gb/s, 400 km G.652 fiber by chirped optical fiberBragg grating (FBG) is introduced. For the first time, we have measured and compensated the polarizationmode dispersion (PMD) of FBG, which in each channel is less than 1.1 ps. When the bit error rate (BER)is 10^(-10) a
In this paper, the dispersion compensation for 4*10 Gb/s, 400 km G.652 fiber by chirped optical fiberBragg grating (FBG) is introduced. For the first time, we have measured and compensated the polarizationmode dispersion (PMD) of FBG, which in each channel is less than 1.1 ps. When the bit error rate (BER)is 10^(-10) and the bit error is zero, the transmission power penalty of each channel is less than 2 dB, andthe best result is negative which means that the receiver sensitivity is increased after transmission..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0109 (2003)
Get PDF
View fulltext
Wideband digitally tunable lasers based on fiber Bragg grating external cavity array and 1*N optical switch
Haiwen Cai, Jianxin Geng, Zuoren Dong, Gaoting Chen, and Zujie Fang
A novel wideband digitally tunable laser based on fiber Bragg grating external cavities and 1*N optical switch provides 5 ms fast tuning time with output power more than 1 dBm over whole C-band that is only limited by the laser emission bandwidth. Less than 50 pm wavelength drift over -10 to 55 oC temperature range mak
A novel wideband digitally tunable laser based on fiber Bragg grating external cavities and 1*N optical switch provides 5 ms fast tuning time with output power more than 1 dBm over whole C-band that is only limited by the laser emission bandwidth. Less than 50 pm wavelength drift over -10 to 55 oC temperature range make that the wavelength locker and monitor are not necessary in this tunable laser..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0112 (2003)
Get PDF
View fulltext
Hollow-core tapered coupler for large inner diameter hollow-core optical fibers
Guiyao Zhou, Zhiyun Hou, Lantian Hou, and Jigang Liu
A novel hollow-core tapered coupler has been theoretically designed and fabricated by fiber drawing machine. The coupler's inner wall is coated with a polycrystalline GeO2 film. The coupling loss of hollow-core tapered coupler is about 0.2 dB. Hollow-core tapered coupler reduces the transmission loss of hollow-core
A novel hollow-core tapered coupler has been theoretically designed and fabricated by fiber drawing machine. The coupler's inner wall is coated with a polycrystalline GeO2 film. The coupling loss of hollow-core tapered coupler is about 0.2 dB. Hollow-core tapered coupler reduces the transmission loss of hollow-core optical fiber (HCOF) by 0.5 dB/m, therefore the coupler is suitable for coupling high power CO2 laser in industrial application..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0115 (2003)
Get PDF
View fulltext
Integrated Optics
Narrow-beam divergence 1.55 μm laser diodes with integrated self-aligned spotsize converter
Weibin Qiu, Wei Wang, Fan Zhou, and Lufeng Wang
This paper describes the high performance of narrow-beam divergence spot size converter (SSC) integrated separately confined heterostructure (SCH) LD. The upper optical confinement layer (OCL) and the butt-coupled tapered thickness waveguide were regrown simultaneously, which not only offered the separated optimization
This paper describes the high performance of narrow-beam divergence spot size converter (SSC) integrated separately confined heterostructure (SCH) LD. The upper optical confinement layer (OCL) and the butt-coupled tapered thickness waveguide were regrown simultaneously, which not only offered the separated optimization of the active region and the integrated spotsize converter, but also reduced the difficulty of the butt-joint selective regrowth. The threshold current was as low as 5.4 mA, the output power at 55 mA was 10.1 mW, the vertical and horizontal far field divergence angles were as low as 9oand 15o, and the 1-dB misalignment tolerances were 3.6 and 3.4 μm, respectively..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0118 (2003)
Get PDF
View fulltext
Growth of strain-compensated InGaAs/GaAsP multiple quantum wells by MOVPE
Yongqin Yu, Xiaoyang Zhang, Baibiao Huang, Jiyong Wei, Hailong Zhou, Jiaoqing Pan, Xiaoyan Qin, and Zhongxiang Ren
InGaAs/GaAsP strain-compensated multiple quantum wells (SCMQWs) and strained InGaAs/GaAs multiple quantum wells (MQWs) were grown on GaAs substrates by metal organic vapor phase epitaxy (MOVPE). The results of double crystal X-ray diffraction (DCXRD) revealed that strain relief had been partly accommodated by the misfi
InGaAs/GaAsP strain-compensated multiple quantum wells (SCMQWs) and strained InGaAs/GaAs multiple quantum wells (MQWs) were grown on GaAs substrates by metal organic vapor phase epitaxy (MOVPE). The results of double crystal X-ray diffraction (DCXRD) revealed that strain relief had been partly accommodated by the misfit dislocation formation in the strained MQW material. It led to that the full width half maximums (FWHMs) of superlattice satellite peaks are broader than those of SCMQWstructures, and there was no detectable room temperature photoluminecence (RT-PL) for the strained MQW structures. With the increasing of the P/As ratio, the separation angle between the substrate peak and the zeroth order peak of SCMQW decreased. The FWHMs of both the zeroth order satellite and RT-PL of SCMQW structures also decreased, whereas the intensity of RT-PL increased. This indicated that the quality of epitaxial layers was improved with the increasing of the strain compensation..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0121 (2003)
Get PDF
View fulltext
Lasers and Laser Optics
High-power output from a compact OPCPA laser system
Zhizhan Xu, Xiaodong Yang, Yuxin Leng, Haihe Lu, Lihuang Lin, Zhengquan Zhang, Ruxin Li, Wenqi Zhang, Dingjun Yin, Shiqi Jin, Jiahui Peng, Bin Tang, and Baozhen Zhao
With a tabletop hybrid Nd:YAG-Nd:glass laser as pump source, a compact optical parametric chirped pulse amplification (OPCPA) laser system with a peak output power of 16.7 TW and a pulse duration of 120 fs has been demonstrated. Chirped pulses are amplified from 50 pJ to more than 3.1 J with an energy gain of above 6
With a tabletop hybrid Nd:YAG-Nd:glass laser as pump source, a compact optical parametric chirped pulse amplification (OPCPA) laser system with a peak output power of 16.7 TW and a pulse duration of 120 fs has been demonstrated. Chirped pulses are amplified from 50 pJ to more than 3.1 J with an energy gain of above 6×10^(10) by three LBO optical parametric amplifiers with a pump energy of 12.4 J at 532 nm. After compression, a final output of 2.0-J/120-fs pulse is obtained. To the best of our knowledge, it is the highest peak output power from an OPCPA laser so far. In addition, a practical design of 1-PWlaser system based on the technique of OPCPA is also proposed..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0124 (2003)
Get PDF
View fulltext
Erbium-doped CW and Q-switched fiber ring laser with fiber grating Michelson interferometer
Anting Wang, Hai Ming, Jianping Xie, Lixin Xu, Wencai Huang, Liang Lv, Xiyao Chen, Feng Li, Yunxia Wu, and Meishu Xing
The band-pass characteristic of fiber grating Michelson interferometer is analyzed, which acts as both band-pass filter and Q-switch. An erbium-doped fiber ring laser based on fiber grating Michelson interferometer is implemented for producing single longitudinal mode CW operation with 5 MHz spectral linewidth and up t
The band-pass characteristic of fiber grating Michelson interferometer is analyzed, which acts as both band-pass filter and Q-switch. An erbium-doped fiber ring laser based on fiber grating Michelson interferometer is implemented for producing single longitudinal mode CW operation with 5 MHz spectral linewidth and up to 6 mW output power. In Q-switched operation, stable fiber laser output pulses with repetition rate of 800 Hz, pulse width of 0.6 μs, average power of 1.8 mW and peak power of 3.4 W are demonstrated. The peak power and average power of the Q-switched pulses are varied with the repetitionrate..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0128 (2003)
Get PDF
View fulltext
Multi-watt Q-switched Nd:YVO4 laser with GaAs output coupler
Ping Li, Qingpu Wang, Shichen Li, Jie Lian, Baomin Ma, and Jingliang He
A passively Q-switched operation of a diode-pumped Nd:YVO4 laser is demonstrated, in which a GaAs film is used as the saturable absorber as well as the output coupler. At the pump power of 10 W, a stable fundamental-mode average power output of 2.11 W was obtained with a pulse duration of 140 ns, pulse energy of 76 μJ
A passively Q-switched operation of a diode-pumped Nd:YVO4 laser is demonstrated, in which a GaAs film is used as the saturable absorber as well as the output coupler. At the pump power of 10 W, a stable fundamental-mode average power output of 2.11 W was obtained with a pulse duration of 140 ns, pulse energy of 76 μJ and pulse repetition rate of 28 kHz. A theoretical analysis that describes the passive Q-switching dynamics of GaAs is presented..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0131 (2003)
Get PDF
View fulltext
Theoretical study on the laser gain of a multi-stage dye laser amplifier
Xianglei Kong, Xianyi Zhang, Xiaolin Luo, Shudong Zhang, Wei Zhang, and Haiyang Li
Theoretical studies on laser gain of a multi-stage dye laser amplifier are presented in this paper. The results show that the influences of amplified spontaneous emission (ASE) and nonlinear absorption of excitedstate on the gain are different for different input laser energies and gains. A threshold input intensity ex
Theoretical studies on laser gain of a multi-stage dye laser amplifier are presented in this paper. The results show that the influences of amplified spontaneous emission (ASE) and nonlinear absorption of excitedstate on the gain are different for different input laser energies and gains. A threshold input intensity exists for a specific system. If the input intensity is higher than the threshold, the nonlinear absorption of excited-state will be the main cause for gain decrease. Otherwise, the ASE is the main cause. A new scheme is proposed to calculate the gain of the amplifier by the comparison of the input intensity with the effective saturation intensity and the choice of the calculation gain method..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0134 (2003)
Get PDF
View fulltext
Materials
Spectra and lasing properties of Er3+, Yb3+:phosphate glasses
Zhuping Liu, Changhong Qi, Shixun Dai, Yasi Jiang, and Lili Hu
The effects of Al2O3, Yb2O3, Er2O3 and OH- on spectral properties of P2O5.Na2O.SrO.Al2O3.Yb2O3.Er2O3 erbium phosphate glass were studied. 5, 8, and 13 mol% Al2O3, 4, 5, 6, 7 and 8 mol% Yb2O3 and 0.05, 0.2, and 0:4 mol% Er2O3 were used. It was found that Al2O3 can improve fluorescent lifetime of Er3+ ions, but the integ
The effects of Al2O3, Yb2O3, Er2O3 and OH- on spectral properties of P2O5.Na2O.SrO.Al2O3.Yb2O3.Er2O3 erbium phosphate glass were studied. 5, 8, and 13 mol% Al2O3, 4, 5, 6, 7 and 8 mol% Yb2O3 and 0.05, 0.2, and 0:4 mol% Er2O3 were used. It was found that Al2O3 can improve fluorescent lifetime of Er3+ ions, but the integrated absorption cross section of Er3+ ions decreases with the increase of Al2O3 concentration. Evaluating from energy transfer efficiency of Yb3+ to Er3+ and spectral parameters of Yb3+ and Er3+, we conclude that 6 mol% Yb2O3 and 0:4 mol% Er2O3 are needed for LD pumped microchip laser applications. OH- groups in glass affect greatly fluorescent intensity and lifetime of Er3+, Yb3+:phosphate glass. The OH- absorption coefficient at 3000 cm^(-1) should be less than 1 cm^(-1) for laser applications. Pumped with a 2-W, 974-nm InGaAs laser diode, CW laser centered at 1530 nm with slope efficiency of 10:6 % and maximum output of 43 mW was achieved in our 2-mm-thick Er3+, Yb3+:phosphate glass at room temperature..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0137 (2003)
Get PDF
View fulltext
The changes of holographic characteristics of photopolymer induced by temperature
Mingju Huang, Huawen Yao, Zhongyu Chen, Lisong Hou, and Fuxi Gan
The changes of holographic characteristics of photopolymer induced by temperature are studied experimentally. The results show that the exposure sensitivity increases with the increase of temperature. The maximum diffraction efficiency and the final maximum diffraction efficiency increase with the increase of temperatu
The changes of holographic characteristics of photopolymer induced by temperature are studied experimentally. The results show that the exposure sensitivity increases with the increase of temperature. The maximum diffraction efficiency and the final maximum diffraction efficiency increase with the increase of temperature when the temperature is lower than Tg (glass transition temperature), while they decrease with the increase of temperature when the temperature is higher than Tg. The effect of the change of temperature on the saturation refractive index modulation is very weak..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0141 (2003)
Get PDF
View fulltext
Medical Optics and Biotechnology
Measurement of optical penetration depth and refractive index of human tissue
Shusen Xie, Hui Li, and Buhong Li
Experimental techniques for measurement of optical penetration depth and refractive index of human tissue are presented, respectively. Optical penetration depth can be obtained from the measurement of the relative fluence-depth distribution inside the target tissue. The depth of normal and carcinomatous human lung tiss
Experimental techniques for measurement of optical penetration depth and refractive index of human tissue are presented, respectively. Optical penetration depth can be obtained from the measurement of the relative fluence-depth distribution inside the target tissue. The depth of normal and carcinomatous human lung tissues irradiated with the wavelengths of 406.7, 632.8 and 674.4 nm in vitro are respectively determined. In addition, a novel simple method based on total internal reflection for measuring the refractive index of biotissue in vivo is developed, and the refractive indices of skin from people of different age, sex and skin color are measured. Their refractive indices are almost same and the average is 1.533..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0144 (2003)
Get PDF
View fulltext
Quantum Optics
What causes the superluminal propagation of light pulses
Shi-Yao Zhu, and Li-Gang Wang
In this paper, we discuss what causes the superluminal propagation of a pulse through dispersion by solving Maxwell's equations without any approximation. The coherence of the pulse plays an important role for superluminal propagation. When the pulse becomes partially coherent, the propagation changes from superlum
In this paper, we discuss what causes the superluminal propagation of a pulse through dispersion by solving Maxwell's equations without any approximation. The coherence of the pulse plays an important role for superluminal propagation. When the pulse becomes partially coherent, the propagation changes from superluminal to subluminal. The energy velocity is always less than the vacuum velocity. The shape of the pulse is changed during the propagation..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0147 (2003)
Get PDF
View fulltext
Forward acceleration and generation of femtosecond, megaelectronvolt electron beams by an ultrafast intense laser pulse
Xiaofang Wang, Quandong Wang, and Baifei Shen
We present a new mechanism of energy gain of electrons accelerated by a laser pulse. It is shown that when the intensity of an ultrafast intense laser pulse decreases rapidly along the direction of propagation, electrons leaving the pulse experience an action of ponderomotive deceleration at the descending part of a lo
We present a new mechanism of energy gain of electrons accelerated by a laser pulse. It is shown that when the intensity of an ultrafast intense laser pulse decreases rapidly along the direction of propagation, electrons leaving the pulse experience an action of ponderomotive deceleration at the descending part of a lower-intensity laser field than acceleration at the ascending part of a high-intensity field, thus gain net energy from the pulse and move directly forward. By means of such a mechanism, a megaelectronvolt electron beam with a bunch length shorter than 100 fs could be realized with an ultrafast (<=30 fs), intense (> 10^(19) W/cm2) laser pulse..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0150 (2003)
Get PDF
View fulltext
Ultrafast Optics
Terahertz wave tomographic imaging with a Fresnel lens
S. Wang, and X.-C. Zhang
We demonstrate three-dimensional tomographic imaging using a Fresnel lens with broadband terahertz pulses. Objects at various locations along the beam propagation path are uniquely imaged on the same imaging plane using a Fresnel lens with different frequencies of the imaging beam. This procedure allows the reconstruct
We demonstrate three-dimensional tomographic imaging using a Fresnel lens with broadband terahertz pulses. Objects at various locations along the beam propagation path are uniquely imaged on the same imaging plane using a Fresnel lens with different frequencies of the imaging beam. This procedure allows the reconstruction of an object’s tomographic contrast image by assembling the frequency-dependent images..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0153 (2003)
Get PDF
View fulltext
Competition between multiphoton/tunnel ionization and filamentation induced by powerful femtosecond laser pulses in air
W. Liu, Q. Luo, and S. L. Chin
In this work we present experiments by focusing 42 femtosecond laser pulses in air using three different focal length lenses: f=100, 30 and 5 cm. For the longest focal length, only the filament, which is a weak plasma column, is observed. When the shorter focal length lens is used, a high density plasma is generated ne
In this work we present experiments by focusing 42 femtosecond laser pulses in air using three different focal length lenses: f=100, 30 and 5 cm. For the longest focal length, only the filament, which is a weak plasma column, is observed. When the shorter focal length lens is used, a high density plasma is generated near the geometrical focus and coexists with a weak plasma channel of the filament. Under the tightest focusing condition, filamentation is prevented and only a strong plasma volume appears at the geometrical focus..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0156 (2003)
Get PDF
View fulltext
Chirping-dependent ionization and dissociation of methane in an intense femtosecond laser field
Haizhen Ren, Chengyin Wu, Ri Ma, Hong Yang, Hongbing Jiang, and Qihuang Gong
We studied the ionization and dissociation of polyatomic molecule methane in an intense femtosecond laser field with wavelength of 810 nm and intensities ranging from 1.4×10^(14) to 2.6×10^(15) W/cm2 by mass spectroscopy. Abundant fragment ions were observed in addition to the strong parent ion. The effect of
We studied the ionization and dissociation of polyatomic molecule methane in an intense femtosecond laser field with wavelength of 810 nm and intensities ranging from 1.4×10^(14) to 2.6×10^(15) W/cm2 by mass spectroscopy. Abundant fragment ions were observed in addition to the strong parent ion. The effect of frequency chirp was investigated and it was found that the negatively chirped pulses dramatically enhanced the dissociation probability, which might be used to control the dissociation pathways..
showLess
Chinese Optics Letters
Publication Date: Jan. 01, 1900
Vol. 1, Issue 1, 0160 (2003)
Get PDF
View fulltext
Email Alert
Submit a Paper
Fiber Optics and Optical Communications
Integrated Optics
Lasers and Laser Optics
Materials
Medical Optics and Biotechnology
Quantum Optics
Ultrafast Optics