Stabilization of Self-Mode-Locked Quantum Dash lasers by symmetric dual-loop optical feedback: effects of power ratio and optical phase tuning

2020 ◽  
Author(s):  
Haroon Asghar ◽  
John G. McInerney
Keyword(s):  
Optical Feedback ◽  
Power Ratio ◽  
Feedback Effects ◽  
Optical Phase ◽  
Quantum Dash ◽  
Phase Tuning

scholarly journals Control of Timing Stability, and Suppression in Delayed Feedback Induced Frequency-Fluctuations by Means of Power Split Ratio and Delay Phase-Dependent Dual-Loop Optical Feedback

2021 ◽  
Vol 11 (10) ◽  
pp. 4529
Author(s):  
Haroon Asghar ◽  
John G. McInerney
Keyword(s):  
Coupling Strength ◽  
Optical Feedback ◽  
Fine Tuning ◽  
Split Ratio ◽  
Optical Delay ◽  
Quantum Dash ◽  
Power Split ◽  
Frequency Fluctuations ◽  
Mode Locked Lasers ◽  
Delayed Optical Feedback

We experimentally demonstrated a power split ratio and optical delay phase dependent dual-loop optical feedback to investigate the suppression of frequency-fluctuations induced due to delayed optical feedback. The device under investigation is self-mode-locked (SML) two-section quantum-dash (QDash) laser operating at ∼21 GHz and emitting at ∼1.55 m. The effect of two selective combinations of power split ratios (Loop-I: −23.29 dB and Loop-II: −28.06 dB, and Loop-I and Loop-II: −22 dB) and two optical delay phase settings ((i) stronger cavity set to integer resonance and fine-tuning the weaker cavity, (ii) weaker cavity set to integer resonance and fine-tuning of stronger cavity) on the suppression of cavity side-bands have been studied. Measured experimental results demonstrate that delayed optical feedback induced frequency-fluctuations can be effectively suppressed on integer resonance as well as on full delay range tuning (0–84 ps) by adjusting coupling strength −22 dB through Loop-I and Loop-II, respectively. Our findings suggest that power split ratio and delays phase-dependent dual-loop optical feedback can be used to maximize the performance of semiconductor mode-locked lasers.

Tolerance to Optical Feedback of 10-Gb/s Quantum-Dash-Based Lasers Emitting at 1.51 $\mu$m

2007 ◽  
Vol 19 (15) ◽  
pp. 1181-1183 ◽  
Author(s):  
S. Azouigui ◽  
B. Dagens ◽  
F. Lelarge ◽  
J. G. Provost ◽  
A. Accard ◽  
...  
Keyword(s):  
Optical Feedback ◽  
Quantum Dash

Optical feedback effects in Te2 superfluorescence

1995 ◽  
Vol 117 (3-4) ◽  
pp. 251-255 ◽  
Author(s):  
H Itji ◽  
J Meziane ◽  
S Oullemine ◽  
E Boursey
Keyword(s):  
Optical Feedback ◽  
Feedback Effects

scholarly journals Pulse Timing Jitter Estimated From Optical Phase Noise in Mode-Locked Semiconductor Quantum Dash Lasers

2020 ◽  
Vol 38 (17) ◽  
pp. 4787-4793 ◽  
Author(s):  
Youxin Mao ◽  
Zhenguo Lu ◽  
Jiaren Liu ◽  
Philip J. Poole ◽  
Guocheng Liu
Keyword(s):  
Phase Noise ◽  
Timing Jitter ◽  
Optical Phase ◽  
Quantum Dash ◽  
Pulse Timing
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