Linewidth optimization in fiber grating Fabry–Perot laser

Hisyam, H.K. and Mahdiraji, G.A. and Abas, A.F. and Mahdi, M.A. and Adikan, Faisal Rafiq Mahamd (2014) Linewidth optimization in fiber grating Fabry–Perot laser. Optical Engineering, 53 (2). 026107. ISSN 0091-3286

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Abstract

Linewidth optimization of a fiber grating Fabry–Perot(FGFP) laser is performed numerically. In addition to the external optical feedback (OFB), the effect of temperature, injection current, cavity volume, gain compression factor, and external cavity parameters [i.e., coupling coefficient (Co) and external cavity length (Lext] on linewidth characteristics are investigated. The effects of external OFB and temperature on linewidth characteristics are calculated according to their effect on threshold carrier density (Nth). The temperature dependence(TD) of linewidth characteristics is calculated according to the TD of laser parameters instead of the well-known Pankove relationship. Results show that the optimum external cavity length (Lext) is 3.1 cm and the optimum range of operating temperature is within �2°C from the fiber Bragg grating (FBG) reference temperature (To). In addition, the antireflection (AR) coating reflectivity value of 1 × 10−2 is sufficient for the laser to operate at narrow linewidth and low fabrication complexity. The linewidth can be reduced either by increasing the laser injection current or the strength of external OFB level.

Item Type: Article
Uncontrolled Keywords: External cavity lasers; External optical feedback; Fiber Bragg grating; Laser linewidth; Semiconductor lasers
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Wati Yusuf
Date Deposited: 27 Oct 2014 03:54
Last Modified: 11 Oct 2018 02:07
URI: http://eprints.um.edu.my/id/eprint/10088

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