Chaos synchronization of semiconductor lasers over 1040-km fiber relay transmission with hybrid amplification

Longsheng Wang; Junli Wang; Yushan Wu; Yuehui Sun; Songsui Li; Lianshan Yan; Yuncai Wang; Anbang Wang

doi:10.1364/PRJ.478487

Journals >Photonics Research >Volume 11 >Issue 6 >Page 953 > Article

Photonics Research
Vol. 11, Issue 6, 953 (2023)

Chaos synchronization of semiconductor lasers over 1040-km fiber relay transmission with hybrid amplification

Longsheng Wang^1、2, Junli Wang^1、2, Yushan Wu^1、2, Yuehui Sun^3、4, Songsui Li⁵, Lianshan Yan⁵, Yuncai Wang^3、4, and Anbang Wang^{1、2、3、4、*}

Author Affiliations

¹Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan 030024, China

²College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

³School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China

⁴Guangdong Provincial Key Laboratory of Photonics Information Technology, Guangzhou 510006, China

⁵Center for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

show less

DOI: 10.1364/PRJ.478487 Cite this Article Set citation alerts

Longsheng Wang, Junli Wang, Yushan Wu, Yuehui Sun, Songsui Li, Lianshan Yan, Yuncai Wang, Anbang Wang. Chaos synchronization of semiconductor lasers over 1040-km fiber relay transmission with hybrid amplification[J]. Photonics Research, 2023, 11(6): 953 Copy Citation Text

EndNote(RIS)

BibTex

Plain Text

show less

(a) Fiber-loop experiment for investigating fidelity transmission of laser chaos; (b) setup of long-reach chaos synchronization. SL: semiconductor laser; DL: drive laser; RLA,B: response lasers; OI: optical isolator; EDFA: erbium-doped fiber amplifier; OF: optical filter; VOA: variable optical attenuator; FM: fiber mirror; PC: polarization controller; EOM: electro-optic modulator; AWG: arbitrary waveform generator; OC: optical coupler; SSMF: standard single-mode fiber; DCF: dispersion compensation fiber; WDM: wavelength division multiplexer; PD: photodetector.

Fig. 1. (a) Fiber-loop experiment for investigating fidelity transmission of laser chaos; (b) setup of long-reach chaos synchronization. SL: semiconductor laser; DL: drive laser; RLA,B: response lasers; OI: optical isolator; EDFA: erbium-doped fiber amplifier; OF: optical filter; VOA: variable optical attenuator; FM: fiber mirror; PC: polarization controller; EOM: electro-optic modulator; AWG: arbitrary waveform generator; OC: optical coupler; SSMF: standard single-mode fiber; DCF: dispersion compensation fiber; WDM: wavelength division multiplexer; PD: photodetector.

Download full size | View in the Article

Single-span fiber transmission. (a) Experimental and (b) simulated fidelities as a function of optical power launched into the fiber for a fixed loop length Lloop=120 km. EDFA gain GE=34.7 dB.

Fig. 2. Single-span fiber transmission. (a) Experimental and (b) simulated fidelities as a function of optical power launched into the fiber for a fixed loop length Lloop=120 km. EDFA gain GE=34.7 dB.

Download full size | View in the Article

Fig. 3. Single-span fiber transmission. (a) Experimental and (b) simulated maximum fidelities and optimum launching power as a function of fiber loop length.

Download full size | View in the Article

Fig. 4. Multispan fiber transmission with the EDFA relay. (a) Experimental and (b) simulated maximum fidelities as a function of relay number for different fiber loop lengths Lloop=90 km, 100 km, and 120 km.

Download full size | View in the Article

Fig. 5. Single-span fiber transmission. (a) Experimental and (b) simulated fidelity as a function of optical power launched into the fiber at different gain ratios of the DFRA and the EDFA for a fixed fiber loop length Lloop=120 km. Total gain GD+GE=34.7 dB.

Download full size | View in the Article

Fig. 6. Single-span fiber transmission. (a) Experimental and (b) simulated maximum fidelity, optimum launching power, and gain ratio as a function of the fiber loop length.

Download full size | View in the Article

Fig. 7. Multispan fiber transmission with the EDFA and the DFRA relay. (a) Experimental and (b) simulated maximum fidelities as a function of relay number for different fiber loop lengths Lloop=120 km, 130 km, and 150 km.

Download full size | View in the Article

Fig. 8. Experimental results of a 1040-km chaos transmission over a straight fiber link using hybrid amplification. (a) Optical spectra; (b) radio-frequency spectra; (c) temporal waveforms; (d) scatter plot. Pin=Pout=5.4 mW, the DFRA gain GD=7.0 dB, and the EDFA gain GE=30.0 dB.

Download full size | View in the Article

Fig. 9. Experimental results of 1040-km chaos synchronization. (a) Optical spectra; (b) radio-frequency spectra; (c) temporal waveforms; (d) scatter plot. The injection strengths of RLA and RLB are 78% and 57%, respectively.

Download full size | View in the Article

Fig. 10. 1040-km chaos synchronization coefficient as a function of (a) time and (b) chaos bandwidth after low-pass filtering (LPF).

Download full size | View in the Article

Parameter	Symbol	Value
Transparency carrier density	$n_{0}$	$1.5 \times 10^{24} m^{- 3}$
Linewidth enhancement factor	$α$	3.0
Gain saturation coefficient	$ε$	$1 \times 10^{- 23} m^{3}$
Linear gain coefficient	$g$	$3 \times 10^{- 20} m^{2}$
Spontaneous emission rate	$β$	0.001
Length of the active region	$l$	300 μm
Width of the active region	$w$	2.5 μm
Grating period	$τ$	$200 \times 10^{- 9} m$
Threshold current	$i_{th}$	20 mA
Bias current	$I$	$1.2 i_{th}$
Static-state wavelength	$λ$	1549.45 nm
Feedback strength	$k_{f}$	1.5%

Table 1. Simulation Parameters of the Semiconductor Laser

View in the Article

Parameter	Symbol	Value
Attenuation coefficient of the SSMF	$α_{s}$	0.2 dB/km
Attenuation coefficient of the DCF	$α_{D}$	0.5 dB/km
Dispersion coefficient of the SSMF	$β_{s}$	$17 {ps nm}^{- 1} {km}^{- 1}$
Dispersion coefficient of the DCF	$β_{D}$	$- 153 {ps nm}^{- 1} {km}^{- 1}$
Raman response coefficient	$ρ$	0.17
Fiber core area	$A_{eff}$	$80 \times 10^{- 12} m^{2}$
SPM coefficient	$ξ$	8/9
Nonlinear refractive index	$n$	$2.6 \times 10^{- 20} m^{2} / W$
Filtering width of the OF	$Λ$	0.2 nm
Noise figure of the EDFA	${NF}_{E}$	4 dB
Noise figure of the DFRA	${NF}_{D}$	$- 1.7 dB$

Table 2. Simulation Parameters of the Fiber, the Filter, and the Amplifier

View in the Article

Number	Length (km)	Dispersion (ps/nm)	Attenuation (dB)
First span	130.005	1.084	30.40
Second span	130.038	1.278	30.10
Third span	129.850	1.054	29.72
Fourth span	130.048	−0.996	30.80
Fifth span	130.015	2.867	29.80
Sixth span	129.960	−3.051	30.83
Seventh span	129.974	−2.541	29.61
Eighth span	130.059	1.414	30.62