Applications|7 Article(s)
Design and preparation of LWIR narrow-band filter with wide rejection band
In this letter, using mult-half-wave structure and some chosen films optimized method, the long-wave infrared (LWIR) narrow-band pass filter is investigated, meanwhile the opposite of the substrate coated with long-wavelength pass film. The transmittance of design spectrum is more than 80% at wavelength region of 8.05–8.35 \mu m, and the average transmittance is less than 0.5% at wavelength region of less than 7.95 and 8.45–14 \mu m. The filter is prepared by thermal evaporation method, and plasma-assisted deposition technology. The experiment result shows that the average transmittance is about 75% in the transmission wavelength range, and the average transmittance of cut-off band is about 0.3%. The results show that multi-half-wave structure and some chosen films optimized method for the preparation LWIR narrow-band pass filter are feasible. The film system is simplified and is convenient to prepare the film.
Chinese Optics Letters
  • Publication Date: May. 09, 2013
  • Vol.11 Issue, s1 S10401 (2013)
Aging ef fect of optical properties on low loss antireflection coatings for laser optics
Yiqin Ji, Yugang Jiang, Huasong Liu, Lishuan Wang, Chenghui Jiang, and Deying Chen
For high precise laser systems like laser gyro, gravitational waves interferometers, the optical components which lie in the cavity or laser path need to control the total loss, scattering, reflection, absorption, and so on. Low loss high-reflection (HR) and antireflection (AR) coating mirrors are their key components and their aging optical properties are the most important performance parameters for long operating lifetime. Low loss AR coatings on quartz substrates for He-Ne laser are designed and manufactured by ion beam sputtering (IBS) technology. Ta2O5 and SiO2 are used as high and low refractive index materials and the obtained total optical loss of AR coating is less than 50 ppm. Aging optical properties of AR coatings are investigated as a function of time placed in the air. When the placed time exceeds 40 days, optical properties tend to be stabilization. The obtained results indicate that the prepared low loss AR coatings have good stability of optical properties and can be applied for high precise laser systems.
Chinese Optics Letters
  • Publication Date: Jun. 07, 2013
  • Vol.11 Issue, s1 S10405 (2013)
Design and preparation of multilayer optical coatings for laser crystal Nd:YVO4 and KTP
Yugang Jiang, Huasong Liu, Lishuan Wang, Chenghui Jiang, Yiqin Ji, and Yaping Yang
Design and preparation of multilayer optical coatings are investigated on laser crystal Nd:YVO4, YVO4, and frequency doubling crystal KTP substrate. Multilayer optical coatings are deposited on one surface of the crystals using the ion beam sputtering technique, and the other surface is coated with a single SiO2 as protective layer. For the YVO4 crystal after coating, the reflectivity at 1 064 and 532 nm are greater than 99.9% and 99.8%, respectively, and the transmissivity at 808 nm is greater than 91.5%. For the KTP crystal after coating, the reflectivity at 1 064 nm is greater than 99.95%, and the transmissivity at 532 nm is greater than 99.5%. After thermal annealing, the transmissivity can be improved. The obtained coated crystals can be used in high power solid-state lasers.
Chinese Optics Letters
  • Publication Date: Jun. 07, 2013
  • Vol.11 Issue, s1 S10406 (2013)
Optical coatings on f iber for relative-humidity sensing applications
Yun Cheng, Weijing Xie, Xun Yu, Hong Lu, and Minghong Yang
Chinese Optics Letters
  • Publication Date: Jun. 14, 2013
  • Vol.11 Issue, s1 S10404 (2013)
Preparation and characterization of in-plane polarized PZT piezoelectric diaphragms
Yi Yin, Kangcheng Qi, Zhicai Xu, Yugong Zeng, and Zulun Lin
The preparation and characterization of in-plane polarized lead zirconate titanate (PZT) piezoelectric diaphragms for sensors and actuators applications are demonstrated in this letter. The single phase PZT films can be obtained on SiO2-passivated silicon substrates via sol-gel technique, in which PbTiO3 (PT) films are used as seed layers. Al reflective layer is deposited and patterned into concentric interdigitated top electrode by lithographic process, subsequently. The diaphragms are released using orientation-dependent wet etching (ODE) method. The size of the diaphragms is 5 mm in diameter and the outer interdigitated (IDT) electrode diameter (4.25 mm) is fixed at 85% of the diaphragm diameter. The three-dimensional (3D) profiles results indicate that the measured maximum central deflection at 15 V is approximately 9 \mu m. Sensing measurements show that the capacitance continually decreases with an increase of applied force, while the case of induced charge exhibits a reverse tendency.
Chinese Optics Letters
  • Publication Date: Jun. 14, 2013
  • Vol.11 Issue, s1 S10403 (2013)
Study on 55o, 905 nm, high reflectivity and visible range beam splitter in cemented cube
Jiaxin Li, Jianjun Tu, and Yaonan Zhu
Chinese Optics Letters
  • Publication Date: Jun. 14, 2013
  • Vol.11 Issue, s1 S10407 (2013)
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