Characterization of transient response in a fiber grating fabry-perot lasers

Hisham, H. and Amouzad Mahdiraji, G. and Abas, A. and Mahdi, M.A. and Adikan, Faisal Rafiq Mahamd (2012) Characterization of transient response in a fiber grating fabry-perot lasers. Photonics Journal, IEEE, 4 (6). 2353 - 2371 . ISSN 1943-0655, DOI

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A comprehensive study on the transient response of fiber-grating Fabry Perot (FGFP) laser is numerically conducted. Fiber Bragg grating (FBG) is used as a wavelength selective element to control the external optical feedback (OFB) level. In addition to the external OFB level, the effect of other external cavity parameters such as temperature, injection current, dc-bias level, coupling coefficient, and gain compression factor on transient response characteristics of the laser are investigated. The temperature dependence (TD) of response characteristics is calculated according to TD of laser parameters instead of well-known Pankove relationship. Results show that, by increasing the laser injection current, the relaxation oscillation�s amplitude, frequency, and damping rate are increased, while the laser turn-on time delay is reduced. In addition to the injection current and dc-bias level, the turn-on time delay can be reduced by increasing OFB reflectivity. It is shown that the optimum external fiber length ðLext� is 3.1 cm and the optimum range of working temperature for FGFP laser is within �2 �C from the FBG reference temperature ðTo�. Also, it is shown that antireflection (AR) coating facet reflectivity value of 1 � 10�2 is sufficient for the laser to operate at good response characteristics with low fabrication complexity.

Item Type: Article
Uncontrolled Keywords: External cavity semiconductor lasers, fiber Bragg grating (FBG), transient response.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 14 Jun 2013 01:15
Last Modified: 11 Oct 2018 02:15

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