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Optical Engineering

All-fiber single-mode high modulation rate pseudorandom-coded laser
Author(s): Xin Zhang; Fang Yang; Yuan Liu; Yan He; Xia Hou; Weibiao Chen
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Paper Abstract

An all-fiber high modulation speed pseudorandom-coded laser based on master oscillator power amplifier configuration is proposed. We use a high modulation rate distributed feedback laser diode as the seed laser to generate the original pseudorandom pulse train. The modulation rate is 1  Gb/s, which corresponds to a minimum pulse interval of 1 ns. A 1 kHz repetition frequency of 10-order M-sequence pseudorandom pulse train is chosen to balance on-line data processing speed and laser ranging resolution. Then, the pseudorandom pulse train is amplified by two-stage amplifiers to boost the output power. All components used in the amplifiers are built in single mode (SM) fiber, so the final output laser is SM with excellent beam quality. Finally, the peak power of pseudorandom code laser is amplified to 23.6 W from 1.5 mW without wave distortion, corresponding to a gain of 42 dB. The ranging experiment of using the optical fiber delay method indoors shows the transmitter of combining modulated laser diode and multistage fiber amplifiers as a promising solution for developing laser for pseudorandom-coded laser ranging.

Paper Details

Date Published: 27 December 2013
PDF: 5 pages
Opt. Eng. 52(12) 126108 doi: 10.1117/1.OE.52.12.126108
Published in: Optical Engineering Volume 52, Issue 12
Show Author Affiliations
Xin Zhang, Shanghai Institute of Optics and Fine Mechanics (China)
Fang Yang, Shanghai Institute of Optics and Fine Mechanics (China)
Yuan Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Yan He, Shanghai Institute of Optics and Fine Mechanics (China)
Xia Hou, Shanghai Institute of Optics and Fine Mechanics (China)
Weibiao Chen, Shanghai Institute of Optics and Fine Mechanics (China)


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