Eur. Phys. J. Appl. Phys.
Volume 25, Number 3, March 2004
|Page(s)||151 - 157|
|Section||Laser, Optics, Optoelectronics and Nanophotonics|
|Published online||21 January 2004|
Mode-locking characteristics and relative intensity noise reduction in hybrid soliton pulse source
Department of Electrical and Electronics Engineering, University of
Gaziantep, 27310 Gaziantep, Turkey
Corresponding author: email@example.com
Revised: 6 November 2003
Accepted: 11 December 2003
Published online: 21 January 2004
The noise and mode-locking phenomena of a hybrid soliton pulse source (HSPS) utilizing different fiber Bragg gratings (FBG) with or without linear chirp are described. The HSPS is modeled by a time-domain solution of the coupled-mode equations including spontaneous emission noise, and relative intensity noise (RIN) is calculated using numerical solutions of these equations. It is found that transform-limited pulses over a wide tuning range around the fundamental mode-locking frequency are generated from mode-locked HSPS with linearly chirped uniform and Gaussian apodized FBGs. Mode-locked pulses that are not transform-limited are generated over a wide tuning range from HSPS with Gaussian apodized and uniform FBGs. These gratings can give transform-limited pulses only over a limited tuning range around the fundamental mode-locking frequency. It is also found that RIN reduction is possible for the mode-locked HSPS by selecting a suitable apodization function such as Gaussian and linear chirp rate.
PACS: 42.60.Fc – Modulation, tuning, and mode locking / 42.55.Wd – Fiber lasers / 42.60.Mi – Dynamical laser instabilities; noisy laser behavior
© EDP Sciences, 2004
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