Study on the method of controlling chaos in an Er-doped fiber dual-ring laser via external optical injection and shifting optical feedback light

2007 ◽  
Vol 17 (1) ◽  
pp. 013106 ◽  
Author(s):  
Yan Senlin
Keyword(s):  
Ring Laser ◽  
Optical Feedback ◽  
Optical Injection ◽  
Controlling Chaos ◽  
Er Doped ◽  
Feedback Light ◽  
Dual Ring

scholarly journals Time-of-flight telemeter based on a ring-laser

2020 ◽  
Vol 52 (9) ◽  
Author(s):  
G. Aromataris ◽  
L. Lombardi ◽  
A. Scirè ◽  
V. Annovazzi-Lodi
Keyword(s):  
Ring Laser ◽  
Optical Feedback ◽  
Time Of Flight ◽  
Optical Injection ◽  
Rate Equations ◽  
Absolute Distance ◽  
Round Trip ◽  
Distance Measurements ◽  
Trip Distance ◽  
Bistability Regime

Abstract We propose a new telemeter scheme for absolute distance measurements, based on a semiconductor ring laser, working in the bistability regime. The optical feedback provided by two external reflectors (a fixed one at short distance, and a moveable one defining the measuring arm) generates commutations of the propagation direction (clockwise, counter-clockwise) inside the ring laser, the period of which is linearly related to the distance of the measure arm reflector. A convenient electrical output signal can be easily obtained by a photodiode located behind the (partially reflecting) fixed mirror. This telemeter, which combines time-of-flight and optical injection, is very simple to implement, since, in addition to the laser, it only requires mirrors and collimation or focusing optics. Also electronic driving and processing are straightforward. Differently from most time-of-flight telemeters, this scheme does not require special provisions or processing to tackle the ambiguity problem. Simulations are performed by mathematical models based on rate-equations. This telemeter has been evaluated in the range 10 cm–32 m of round trip distance, with a fixed arm of 10 μm–10 cm, assuming typical literature parameters for a 1 mW ring laser.

scholarly journals Temperature sensor based on Er-doped Cascaded-Peanut Taper Structure in-line interferometer in fiber ring laser

2021 ◽  
pp. 1-1
Author(s):  
Weihao Lin ◽  
Fang Zhao ◽  
Li-Yang Shao ◽  
Mang I Vai ◽  
Perry Ping Shum ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Ring Laser ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Er Doped

In-Fiber Macau Zehnder Interferometer Sensor Based on Er doped Fiber Peanut Structure in Fiber Ring Laser

2021 ◽  
pp. 1-1
Author(s):  
Weihao Lin ◽  
Liyang Shao ◽  
Mang I Vai ◽  
Perry Ping Shum ◽  
Liu Shuaiqi ◽  
...  
Keyword(s):  
Ring Laser ◽  
Zehnder Interferometer ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Er Doped

Multi-target ranging using optical reservoir computing approach in the laterally coupled semiconductor lasers with self-feedback

2021 ◽  
Author(s):  
Dong-Zhou Zhong ◽  
Zhe Xu ◽  
Ya-Lan Hu ◽  
Ke-Ke Zhao ◽  
Jin-Bo Zhang ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Hilbert Transform ◽  
Optical Feedback ◽  
Optical Injection ◽  
Reservoir Computing ◽  
Probe Signal ◽  
Laser Array ◽  
Target Ranging ◽  
Relative Errors ◽  
Computing Approach

Abstract In this work, we utilize three parallel reservoir computers using semiconductor lasers with optical feedback and light injection to model radar probe signals with delays. Three radar probe signals are generated by driving lasers constructed by a three-element lase array with self-feedback. The response lasers are implemented also by a three-element lase array with both delay-time feedback and optical injection, which are utilized as nonlinear nodes to realize the reservoirs. We show that each delayed radar probe signal can well be predicted and to synchronize with its corresponding trained reservoir, even when there exist parameter mismatches between the response laser array and the driving laser array. Based on this, the three synchronous probe signals are utilized for ranging to three targets, respectively, using Hilbert transform. It is demonstrated that the relative errors for ranging can be very small and less than 0.6%. Our findings show that optical reservoir computing provides an effective way for applications of target ranging.

The Role of Master Laser with Feedback in Time-Delay Signature Suppression of Semiconductor Laser Subject to Chaotic Optical Injection

2017 ◽  
Vol 27 (11) ◽  
pp. 1750169 ◽  
Author(s):  
Liyue Zhang ◽  
Wei Pan ◽  
Penghua Mu ◽  
Xiaofeng Li ◽  
Shuiying Xiang ◽  
...  
Keyword(s):  
Time Delay ◽  
Semiconductor Laser ◽  
Optical Feedback ◽  
Bias Current ◽  
Optical Injection ◽  
Strength Parameter ◽  
Master Laser ◽  
Feedback Strength ◽  
Chaotic Signals

The important role of parameters in master laser with optical feedback for the elimination of time-delay (TD) signature in semiconductor laser subject to chaotic optical injection is investigated systemically. The experimental results show that TD signature suppressed chaotic signals can be credibly generated by increasing the feedback strength of the master laser, which is quite different from the trends observed in semiconductor laser (SL) with optical feedback. Systematically numerical analysis is also carried out as a validation, and it is shown that with low bias current and strong feedback strength, parameter regions contributing to successful TD suppression are much wider. Furthermore, it is shown that the influence of frequency detuning in TD concealment will change with the increase of feedback strength. All the numerical results are in perfect accordance with experimental observation.

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