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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 7 — Apr. 1, 2009
  • pp: 869–871

Time-gated filter for sideband suppression

Jason Chou, Todd S. Rose, Josh A. Conway, George C. Valley, and Bahram Jalali  »View Author Affiliations

Optics Letters, Vol. 34, Issue 7, pp. 869-871 (2009)

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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 20 GHz , 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 20 dB and that a TS-ADC using this filter can digitize electrical signals with rfs beyond 100 GHz .

© 2009 Optical Society of America

OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: December 2, 2008
Revised Manuscript: January 20, 2009
Manuscript Accepted: January 24, 2009
Published: March 16, 2009

Jason Chou, Todd S. Rose, Josh A. Conway, George C. Valley, and Bahram Jalali, "Time-gated filter for sideband suppression," Opt. Lett. 34, 869-871 (2009)

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