A technique is experimentally demonstrated to double the frequency of a microwave signal by synchronising and polarisation multiplexing the optical signals from a dual-output Mach–Zehnder modulator. The frequency-doubled tone at 4 GHz is 41.2 dB stronger than the residual fundamental-frequency tone. The strongest side tone is found at 12 GHz (sixth order) and is suppressed by 32.7 dB. The phase noise of the frequency-doubled signal is −104.1 dBc/Hz at an offset of 10 kHz, an increase of 6.7 dB over that of the initial signal. This technique does not rely on electronic or optical filters or amplifiers and is demonstrated using commercial off-the-shelf components.

References

1. 1)
  - 6. Xu, L., Li, C., Tsang, H.K., et al: ‘Optical frequency doubling for multichannel radio-over-fibre system based on integrated phase modulator and silicon coupled microring notch filter’, Electron. Lett., 2009, 45, (13), pp. 697–698 (doi: 10.1049/el.2009.0314).
2. 2)
  - 8. Yang, B., Jin, X., Chi, H., et al: ‘Optically tunable frequency-doubling Brillouin optoelectronic oscillator with carrier phase-shifted double sideband modulation’, Photon. Technol. Lett., 2012, 24, (12), pp. 1051–1053 (doi: 10.1109/LPT.2012.2194483).
3. 3)
  - 1. Pan, S., Yao, J.: ‘A frequency-doubling optoelectronic oscillator using a polarisation modulator’, Photon. Technol. Lett., 2009, 21, (13), pp. 929–931 (doi: 10.1109/LPT.2009.2020685).
4. 4)
  - 5. Ou, H., Chen, B., Fu, H., et al: ‘Microwave-photonic frequency doubling utilising phase modulator and fibre Bragg grating’, Photon. J., 2008, 44, (2), pp. 131–132.
5. 5)
  - 7. Wang, L., Zhu, N., Li, W., et al: ‘A frequency-doubling optoelectronic oscillator based on a dual-parallel Mach Zehnder modulator and a chirped fibre Bragg grating’, Photon. Technol. Lett., 2011, 23, (22), pp. 1688–1690 (doi: 10.1109/LPT.2011.2167141).
6. 6)
  - 3. Chong, Y., Yang, C., Li, X., et al: ‘A frequency-doubling optoelectronic oscillator using a three-arm dual-output Mach-Zehnder modulator’, J. Opt. Soc. Korea, 2013, 17, (6), pp. 491–493 (doi: 10.3807/JOSK.2013.17.6.491).
7. 7)
  - 2. Liu, X., Pan, W., Zou, X., et al: ‘Frequency-doubling optoelectronic oscillator using DSB-SC modulation and carrier recovery based on stimulated Brillouin scattering’, Photon. J., 2013, 5, (2), p. 6600606 (doi: 10.1109/JPHOT.2013.2245880).
8. 8)
  - 4. Shin, M., Kumar, P., Shin, M., et al: ‘Frequency-doubling optoelectronic oscillator for generating high-frequency microwave signals with low phase noise’, Electron. Lett., 2007, 43, (4), pp. 242–244 (doi: 10.1049/el:20073636).
9. 9)
  - 9. Zhu, D., Pan, S., Cai, S., et al: ‘High-performance photonic microwave downconverter based on a frequency-doubling optoelectronic oscillator’, J. Lightwave Technol., 2012, 30, (18), pp. 3036–3042 (doi: 10.1109/JLT.2012.2211096).
10. 10)
  - 10. Banerjee, S., Agarwal, A., Grosz, D.F., et al: ‘Long-haul 64 × 40 Gbit/s DWDM transmission over commercial fibre types with large operating margins’, Electron. Lett., 2003, 39, (1), pp. 92–94 (doi: 10.1049/el:20030047).

Microwave frequency doubling by synchronising and polarisation multiplexing the optical signals from a dual-output Mach–Zehnder modulator

References

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