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Proceedings Paper

Simulations of statistical parameter distributions in distributed-feedback lasers using a transmission-line laser model
Author(s): Benoit Reid; Ian Woods; J. Kenton White; Karin Hinzer; Michael Vitic; Daniel Robinson; Anthony Grabham
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Paper Abstract

A transmission-line laser model has been used for simulating distributed-feedback (DFB) lasers. Statistical distributions of laser parameters like threshold current, slope efficiency, front-to-back power ratio, or side-mode-suppression ratio (SMSR) are generated by varying randomly lasers’ facet phases. Model parameters were adjusted by comparing simulated and experimental distributions for a continuous wave (CW) index-coupled and a 2.5 Gbit/s gain-coupled directly-modulated (DM) DFB lasers. For the index-coupled DFB laser, agreement with experimental data is excellent except for the front-to-back power ratio, which has a larger spread than measured experimentally. For the gain-coupled DFB laser, distributions are in excellent agreement with experimental data, but the SMSR is calculated to have a median about 6 dB larger than measurement. Distributions of small-signal parameters and dispersion penalties after propagating in an optical fibre are also generated for various drive conditions and design parameters. It is shown that a grating with an index coupling larger than 4.0 and a gain coupling of around 0.05 gives the highest 2 dB dispersion penalty yields for a reach of 450 km. There is nevertheless a compromise between high dispersion penalty yields and CW single-mode yields when using large index coupling coefficients with only a small amount of gain coupling.

Paper Details

Date Published: 16 November 2004
PDF: 11 pages
Proc. SPIE 5579, Photonics North 2004: Photonic Applications in Telecommunications, Sensors, Software, and Lasers, (16 November 2004); doi: 10.1117/12.567375
Show Author Affiliations
Benoit Reid, Bookham Technology, Inc. (Canada)
Ian Woods, Bookham Technology, Inc. (Canada)
J. Kenton White, Bookham Technology, Inc. (Canada)
Karin Hinzer, Bookham Technology, Inc. (Canada)
Michael Vitic, Bookham Technology, Inc. (Canada)
Daniel Robinson, Bookham Technology Plc (United Kingdom)
Anthony Grabham, Bookham Technology Plc (United Kingdom)

Published in SPIE Proceedings Vol. 5579:
Photonics North 2004: Photonic Applications in Telecommunications, Sensors, Software, and Lasers
Donna Strickland; Trevor J. Hall; Stoyan Tanev; Xiaoyi Bao; Franko Kueppers; David V. Plant, Editor(s)

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