Title :
High-speed direct Modulation of widely tunable MG-Y laser
Author :
Chacinski, M. ; Isaksson, M. ; Schatz, R.
Author_Institution :
IMIT Dept., R. Inst. of Technol., Kista-Stockholm, Sweden
fDate :
6/1/2005 12:00:00 AM
Abstract :
The dynamic performance of the modulated-grating Y-branch laser is presented. In order to reach over 40-nm tuning range, the devices utilize an additive Vernier effect and relative tuning of two reflecting gratings. The device shows high (>13 dBm ex-facet) and uniform (<1.2-dB variation) steady state output power over the tuning range, and sidemode suppression ratio >40 dB. The laser behavior under small- and large-signal operation conditions is investigated. The laser exhibits a resonance frequency of 7.4-8.8 GHz at 80-mA bias. A 10-Gb/s eye diagram measurement showed high extinction ratio and signal-to-noise ratio.
Keywords :
diffraction gratings; high-speed optical techniques; laser tuning; light reflection; optical fibre communication; optical modulation; semiconductor lasers; 10 Gbit/s; 7.4 to 8.8 GHz; 80 mA; Y-branch laser; additive Vernier effect; direct modulation; eye diagram measurement; high extinction ratio; high-speed modulation; large-signal operation; laser behavior; modulated-grating laser; reflecting gratings; semiconductor laser; sidemode suppression ratio; signal-to-noise ratio; small-signal operation; steady state output power; uniform output power; widely tunable laser; Extinction ratio; Gratings; Laser tuning; Power generation; Resonance; Resonant frequency; Signal analysis; Signal to noise ratio; Steady-state; Tunable circuits and devices; High-speed modulation; semiconductor laser; tunable laser;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.846489
