Cart (Loading....) | Create Account
Close category search window
 

Closed-Form Approximations to the Threshold Quantities of Distributed-Feedback Lasers With Varying Phase Shifts and Positions

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Kremp, T. ; OFS Labs., Somerset, NJ, USA ; Abedin, K.S. ; Westbrook, P.S.

We derive analytical approximations to the threshold gain, detuning, and power distribution ratios of distributed-feedback lasers with a variable phase shift at a variable longitudinal position. These closed-form approximations exhibit the direct influence of the grating parameters, and are in excellent agreement with the exact solution of the coupled mode equations for a wide range of phase shifts, positions, grating strengths and lengths. It is shown that the product of grating strength and phase shift offset distance from the grating center has a dominant influence on most threshold parameters. The threshold gain and output power splitting ratio grow exponentially with this product, whereas the intracavity peak power and the Q-factor of the cavity decay exponentially with it. It is also shown that a nonvanishing sine of the phase shift leads to a linear change of the detuning, a quadratic increase of the threshold gain, and a quadratic decrease of the output power splitting ratio, intracavity peak power, and Q-factor. Our results are independent of the source of the gain, such as semiconductor, rare-earth, and Raman fiber lasers, provided that the gain is approximately constant along the grating length and that reflections from facets can be neglected. As an example, we simulate a Raman DFB laser and demonstrate that our closed-form approximations are in perfect agreement with steady state results from involved time-domain simulations.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:49 ,  Issue: 3 )

Date of Publication:

March 2013

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.