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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 26 — Dec. 12, 2011
  • pp: B313–B322

Dynamic linewidth measurement technique using digital intradyne coherent receivers

Robert Maher and Benn Thomsen  »View Author Affiliations

Optics Express, Vol. 19, Issue 26, pp. B313-B322 (2011)

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The phase noise characteristics and laser stabilization time of a tunable laser under both static and fast switching operation is characterized using a dynamic linewidth measurement technique which employs a digital intradyne coherent receiver. The measurement technique utilizes a time domain frequency estimator to characterize the laser phase noise and also analyses the separate noise contributions to the overall laser linewidth. The performance of the measurement technique is validated using a phase noise emulator and a low linewidth (10kHz) external cavity laser. The dynamic stabilization time, in terms of instantaneous frequency and linewidth, of a fast switching tunable DSDBR laser is subsequently investigated and we demonstrate that a minimum linewidth for a DSDBR laser can be realized within 50ns of a wavelength switching event in a 5-channel 50GHz spaced WDM system.

© 2011 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(140.3600) Lasers and laser optics : Lasers, tunable
(290.3700) Scattering : Linewidth
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Subsystems for Optical Networks

Original Manuscript: October 3, 2011
Revised Manuscript: October 25, 2011
Manuscript Accepted: October 25, 2011
Published: November 18, 2011

Virtual Issues
European Conference on Optical Communication 2011 (2011) Optics Express

Robert Maher and Benn Thomsen, "Dynamic linewidth measurement technique using digital intradyne coherent receivers," Opt. Express 19, B313-B322 (2011)

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