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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 3 — Feb. 1, 2009
  • pp: 313–315

Repetition-rate-tunable return-to-zero and carrier-suppressed return-to-zero optical pulse train generation using a polarization modulator

Xihua Zou and Jianping Yao  »View Author Affiliations


Optics Letters, Vol. 34, Issue 3, pp. 313-315 (2009)
http://dx.doi.org/10.1364/OL.34.000313


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Abstract

An approach is proposed to generating return-to-zero (RZ) and carrier-suppressed return-to-zero (CS-RZ) pulse trains with a high and tunable repetition rate by using a polarization modulator (PolM). The PolM is a special phase modulator that can support both TE and TM modes with opposite phase modulation indices. A linearly polarized cw light with its polarization state oriented with an angle of 45° to one principal axis of the PolM is modulated by a sinusoidal signal at the PolM. The output light from the PolM is then sent to a polarization beam splitter (PBS), with one axis of the PBS aligned at an angle of 45° to one principle axis of the PolM. At the two outputs of the PBS, two optical signals with one consisting of the even-order optical sidebands and the other consisting of the odd-order optical sidebands are obtained, leading to the generation of an RZ and a CS-RZ pulse train having a repetition rate that is twice the frequency of the drive sinusoidal signal. The proposed approach is demonstrated by a proof-of-concept experiment in which an RZ and a CS-RZ pulse train with tunable repetition rates of 7.2 and 8 GHz are generated.

© 2009 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4080) Fiber optics and optical communications : Modulation
(260.5430) Physical optics : Polarization
(320.5550) Ultrafast optics : Pulses

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 17, 2008
Revised Manuscript: December 15, 2008
Manuscript Accepted: December 17, 2008
Published: January 26, 2009

Citation
Xihua Zou and Jianping Yao, "Repetition-rate-tunable return-to-zero and carrier-suppressed return-to-zero optical pulse train generation using a polarization modulator," Opt. Lett. 34, 313-315 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-3-313

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