Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 30, Issue 13, Pages 1242-1245Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2018.2841659
Keywords
Optoelectronic oscillator (OEO); semiconductor microlaser; direct modulation; microwave generation
Funding
- National Key Research and Development Program of China [2016YFB0402304]
- National Natural Science Foundation of China [61527823, 61376048]
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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.
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