A NOVEL DISTRIBUTED-FEEDBACK LASER-DIODE STRUCTURE FOR AN OPTICAL WAVELENGTH TUNABLE FILTER

Authors
GHAFOURISHIRAZ H LEW SH TAN PW KOBAYASHI S KAMATA IN YAMADA K
Citation
H. Ghafourishiraz et al., A NOVEL DISTRIBUTED-FEEDBACK LASER-DIODE STRUCTURE FOR AN OPTICAL WAVELENGTH TUNABLE FILTER, Semiconductor science and technology, 12(9), 1997, pp. 1161-1165
Citations number
14
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Condensed Matter","Material Science
Journal title
Semiconductor science and technology → ACNP
ISSN journal
02681242
Volume
12
Issue
9
Year of publication
1997
Pages
1161 - 1165
Database
ISI
SICI code
0268-1242(1997)12:9<1161:ANDLSF>2.0.ZU;2-K
Abstract
We have studied the effects of introducing phaseshifts in the active s ection of a 1.5 mu m phaseshift-controlled DFB wavelength tunable filt er on tuning range, peak power transmissivity and side-mode suppressio n ratio (SMSR). The analysis indicates that when phi(1) = phi(4) = pi/ 2 the filter wavelength tuning range is 22.1 Angstrom for the grating coupling coefficient kappa = 6 mm(-1) while maintaining almost constan t transmissivity (gain) of more than 35 dB. The filter SMSR ranges fro m 11.1 to 25.4 dB. The results for asymmetric values of phi(1) and phi (2) are also given.