Tunable Optoelectronic Oscillator Using a Directly Modulated Microsquare Laser

A tunable optoelectronic oscillator (OEO) employing a directly modulated microsquare laser is proposed and experimentally demonstrated without using any external modulator and electrical bandpass filter. In our scheme, the OEO oscillates near the relaxation oscillation frequency at which the microsq...

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Bibliographic Details
Published in:IEEE photonics technology letters 2018-07, Vol.30 (13), p.1242-1245
Main Authors: Liao, Ming-Long, Xiao, Jin-Long, Huang, Yong-Zhen, Weng, Hai-Zhong, Han, Jun-Yuan, Xiao, Zhi-Xiong, Yang, Yue-De
Format: Article
Language:English
Subjects:
direct modulation
Laser modes
Masers
microwave generation
Microwave oscillators
Microwave photonics
Modulation
Optical attenuators
Optoelectronic oscillator (OEO)
semiconductor microlaser
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Summary:A tunable optoelectronic oscillator (OEO) employing a directly modulated microsquare laser is proposed and experimentally demonstrated without using any external modulator and electrical bandpass filter. In our scheme, the OEO oscillates near the relaxation oscillation frequency at which the microsquare laser has the highest modulation efficiency. Microwave signals with the frequency tuned from 3.51 to 8.16 GHz are generated by tuning the bias current of the microsquare laser. Single sideband phase noise of -112.5 dBc/Hz is obtained at a frequency offset of 10 kHz for the generated 7.48 GHz microwave signal.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2018.2841659