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High-speed direct Modulation of widely tunable MG-Y laser

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3 Author(s)
Chacinski, M. ; IMIT Dept., R. Inst. of Technol., Kista-Stockholm, Sweden ; Isaksson, M. ; Schatz, R.

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.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 6 )