Wavelength-Tunable Semiconductor Light Sources for WDM Applications

Yuichi TOHMORI  Hiroyuki ISHII  Hiromi OOHASHI  Yuzo YOSHIKUNI  

IEICE TRANSACTIONS on Electronics   Vol.E85-C   No.1   pp.21-26
Publication Date: 2002/01/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Issue on Recent Progress in Semiconductor Lasers and Light-Emitting Devices)
wavelength-selectable lasers,  distributed-feed-back (DFB) lasers,  distributed-Bragg-reflector (DBR) lasers,  super-structure-grating (SSG),  semiconductor optical amplifier (SOA),  

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This paper describes the recent progress made in developing wavelength tunable semiconductor light sources for WDM applications. Wide and quasi-continuous wavelength tunings were investigated for a wavelength-selectable laser and a wavelength tunable distributed Bragg reflector (DBR) laser having a super structure grating (SSG). A wavelength-selectable laser consisting of a DFB laser array, a multi-mode interferometer (MMI), and a semiconductor optical amplifier (SOA) demonstrated a quasi-continuous tuning range of 46.9 nm by using temperature control. A wavelength-tunable DBR laser with SSG exhibited a quasi-continuous tuning range of 62.4 nm by using three tuning current controls. Wavelength stabilization was also demonstrated under the temperature variations of 5.