Citation

Harun, Sulaiman Wadi and Saat, Nor Kamilah and Ahmad, Harith (2005) Gain control in S-band erbium-doped fiber amplifier using a fiber bragg grating. IEICE Electronics Express, 2 (6). pp. 186-191. ISSN 1349-2543

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Abstract

A gain-clamped short wavelength band erbium-doped fiber amplifier (S-band EDFA) is demonstrated utilizing a fiber Bragg grating (FBG). The amplification in S-band is achieved using an erbium-doped fiber (EDF) with depressed cladding design, which suppressed amplified spontaneous emission (ASE) at longer wavelength. The gain clamping is achieved by routing back the forward ASE into the feedback loop as to create a ring laser. The clamped gain is controlled using a variable optical attenuator (VOA) as to generate a gain of 14.6 to 25.2 dB for input signal at 1504 nm. At VOA = 0 dB, the gain is clamped at 14.6 dB with a gain variation of less than +/- 0.5 dB for input signal at 1504 nm with power dynamic range of - 40 to - 5 dBm. The noise figure penalty is less than 0.8 dB in this amplifier since the laser is arranged to be co-propagated with the signal.

Item Type:	Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	12 Sep 2011 02:40
Last Modified:	12 Sep 2011 02:40
URII:	http://shdl.mmu.edu.my/id/eprint/2249

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