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Wavelength-Tunable Semiconductor Light Sources for WDM Applications
Yuichi TOHMORI Hiroyuki ISHII Hiromi OOHASHI Yuzo YOSHIKUNI
IEICE TRANSACTIONS on Electronics
Publication Date: 2002/01/01
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.