A 30-GHz Self-Injection-Locked Oscillator Having a Long Optical Delay Line for Phase-Noise Reduction

We demonstrate a millimeter-wave self-injection-locked (SIL) oscillator having a long optical delay line as a feedback route. In the SIL oscillator, a part of output signal is self-injected into the oscillator after passing through a long optical delay line, resulting in locked oscillation and phase-noise reduction. By controlling the self-injection power, we achieve 30-GHz oscillation with a sidemode suppression ratio larger than 50 dB and about 18-dB phase-noise reduction at 10-kHz frequency offset.

[1]  U. Gliese,et al.  Chromatic dispersion in fiber-optic microwave and millimeter-wave links , 1996 .

[2]  L. Maleki,et al.  Optoelectronic microwave oscillator , 1996 .

[3]  To-Po Wang,et al.  Phase-Noise Reduction of $X$-Band Push–Push Oscillator With Second-Harmonic Self-Injection Techniques , 2007, IEEE Transactions on Microwave Theory and Techniques.

[4]  L. Maleki,et al.  Converting light into spectrally pure microwave oscillation. , 1996, Optics letters.

[5]  L. Maleki,et al.  Low phase noise and spurious level in multi-loop opto-electronic oscillators , 2003, IEEE International Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003.

[6]  L. Maleki,et al.  Multiloop optoelectronic oscillator , 2000, IEEE Journal of Quantum Electronics.

[7]  Heng-Chia Chang.  Phase noise in self-injection-locked oscillators - theory and experiment , 2003 .

[8]  J. Chazelas,et al.  Improving thermal stability of opto-electronic oscillators , 2006, IEEE Microwave Magazine.

[9]  Heng-Chia Chang,et al.  Stability analysis of self-injection-locked oscillators , 2003 .