scholarly journals Generation of Broadband Optical Frequency Comb Based on a Gain-Switching 1550 nm Vertical-Cavity Surface-Emitting Laser under Optical Injection

Photonics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 95
Author(s):  
Huiping Ren ◽  
Li Fan ◽  
Na Liu ◽  
Zhengmao Wu ◽  
Guangqiong Xia
Keyword(s):  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Injection ◽  
Cavity Surface ◽  
Orthogonal Polarization ◽  
Optical Frequency ◽  
Gain Switching ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity

In this work, broadband optical frequency comb (OFC) generation by a gain-switching vertical-cavity surface-emitting laser (VCSEL) subject to optical injection is investigated experimentally. During implementing the experiment, a 1550 nm VCSEL under a large signal current modulation is driven into the gain-switching state with a broad noisy spectrum. By further introducing an optical injection, a high performance OFC can be produced. The experimental results demonstrate that the power and wavelength of the injection light seriously affect the performance of the produced OFC. Under proper optical injection parameters, two sub-combs originating from two orthogonal polarization components of the VCSEL can splice into a broadband total-OFC. By selecting optimized operation parameters, a high quality total-OFC can be acquired, with stable comb lines, high coherence, wide bandwidth of 70.0 GHz (56.0 GHz) within 10 dB (3 dB) amplitude variation and low single sideband phase noise at the fundamental frequency below −120.6 dBc/Hz @ 10 kHz.

scholarly journals Dynamics of vertical-cavity surface-emitting laser subject to optical injection and positive optoelectronic feedback

2012 ◽  
Vol 61 (11) ◽  
pp. 114202
Author(s):  
Cao Ti ◽  
Lin Xiao-Dong ◽  
Xia Guang-Qiong ◽  
Chen Xing-Hua ◽  
Wu Zheng-Mao
Keyword(s):  
Optical Injection ◽  
Cavity Surface ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity

scholarly journals Study of Gain Switching in Vertical Cavity Surface Emitting Laser under Different Electrical Pulse Inputs

2020 ◽  
Vol 70 (5) ◽  
pp. 538-541
Author(s):  
K. Murali Krishna ◽  
M. Ganesh Madhan ◽  
P. Ashok
Keyword(s):  
Pulse Width ◽  
High Speed ◽  
Peak Power ◽  
Pulse Generation ◽  
Optical Data ◽  
Cavity Surface ◽  
Gain Switching ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity

Vertical cavity surface emitting laser (VCSEL) is a strong candidate for short pulse generation among the other semiconductor lasers in the era of laser technology. A 1550 nm, low power VCSEL is excited under different current shapes and the chief laser parameters are found out. The concept of gain switching under various current profiles are utilized effectively to bring out maximum laser power with minimum pulse width, which are the essential factors for long haul high speed optical data transmission. For a haversine electrical current input with 3.7 Ith amplitude, a laser peak power of 2.2 mW at 57 ps pulse width is obtained. In the case of trapezoidal pulse, 67 ps pulse width is obtained for 2.6 Ith current amplitude. It is also observed that square pulse of amplitude 2 Ith produces short optical pulse of 0.887 mW peak power and 89 ps width which shows the best performance when compared to other forms of pulses discussed in this work at the same input condition.

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