| Original Articles |
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Phase Noise of Optically Generated Microwave Using Sideband Injection Locking |
| HUANG Jin, SUN Chang-Zheng, SONG Yu, XIONG Bing, LUO Yi |
| State Key Lab on Integrated Optoelectronics, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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HUANG Jin, SUN Chang-Zheng, SONG Yu et al 2008 Chin. Phys. Lett. 25 3980-3983 |
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Abstract Optically generated 20-GHz microwave carriers with phase noise lower than -75dBc/Hz at 10kHz offset and lower than -90dBc/Hz at 100kHz offset are
obtained using single- and double-sideband injection locking. Within the locking range, the effect of sideband injection locking can be regarded as narrow-band amplification of the modulation sidebands. Increasing the current of slave laser will increase the power of beat signal and reduce the phase noise to a certain extent. Double-sideband injection locking can increase the power of the generated microwave carrier while keeping the phase noise at a low level. It is also revealed that partially destruction of coherence between the two beating lights in the course of sideband injection locking would impair the phase noise performance.
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| Keywords:
42.55.-f
42.55.Px
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Received: 17 June 2008
Published: 25 October 2008
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