Wideband-frequency tunable optoelectronic oscillator based on injection locking to an electronic oscillator

We experimentally demonstrate a wideband-frequency tunable optoelectronic oscillator (OEO) based on injection locking of the OEO to a tunable electronic oscillator. The OEO cavity does not contain a narrowband filter and its frequency can be tuned over a broad bandwidth of 1 GHz. The injection locki...

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Bibliographic Details
Published in:Optics letters 2016-05, Vol.41 (9), p.1993-1996
Main Authors: Fleyer, Michael, Sherman, Alexander, Horowitz, Moshe, Namer, Moshe
Format: Article
Language:English
Subjects:
Adjustment
Electronics
Holes
Injection locking
Narrowband
Noise
Optoelectronics
Oscillators
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Summary:We experimentally demonstrate a wideband-frequency tunable optoelectronic oscillator (OEO) based on injection locking of the OEO to a tunable electronic oscillator. The OEO cavity does not contain a narrowband filter and its frequency can be tuned over a broad bandwidth of 1 GHz. The injection locking is based on minimizing the injected power by adjusting the frequency of one of the OEO cavity modes to be approximately equal to the frequency of the injected signal. The phase noise that is obtained in the injection-locked OEO is similar to that obtained in a long-cavity self-sustained OEO. Although the cavity length of the OEO was long, the spurious modes were suppressed due to the injection locking without the need to use a narrowband filter. The spurious level was significantly below that obtained in a self-sustained OEO after inserting a narrowband electronic filter with a Q-factor of 720 into the cavity.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.41.001993