A time-gated filter is demonstrated that converts a double-sideband radio-frequency (rf) waveform on a pulsed optically chirped carrier into a single sideband (SSB) waveform. Electrical technology to produce SSB modulation is currently limited to rfs less than , while our filter operates up to the maximum frequency available from optical modulators. Application of the filter in photonic time-stretch analog-to-digital converters (TS-ADCs) mitigates severe frequency fading owing to the dispersion penalty that limits the rf input signal bandwidth and time aperture. Here we show that frequency fading owing to the presence of both upper and lower sidebands in the TS-ADC can be reduced by over and that a TS-ADC using this filter can digitize electrical signals with rfs beyond .
© 2009 Optical Society of AmericaFull Article | PDF Article
Eric Vourc’h and Didier Hervé
Opt. Lett. 28(13) 1105-1107 (2003)
Chun-Ting Lin, Yu-Min Lin, Jason (Jyehong) Chen, Sheng-Peng Dai, Po Tsung Shih, Peng-Chun Peng, and Sien Chi
Opt. Express 16(9) 6056-6063 (2008)
Ying Li, Zhiwei Zheng, Lin Chen, Shuangchun Wen, and Dianyuan Fan
Appl. Opt. 48(16) 3008-3013 (2009)