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Wide-Tuning-Wavelength-Range LGLC Laser with Low-Loss Dual-Core Spot Size Converter
Takanori SUZUKI Hideo ARIMOTO Takeshi KITATANI Aki TAKEI Takafumi TANIGUCHI Kazunori SHINODA Shigehisa TANAKA Shinji TSUJI Tatemi IDO Jun IGRASHI Atsushi NAKAMURA Kazuhiko NAOE Kenji UCHIDA
IEICE TRANSACTIONS on Electronics
Publication Date: 2012/07/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
semiconductor lasers, laser tuning, optical filter,
Full Text: PDF(940.5KB)>>
A dual-core spot size converter (DC-SSC) is integrated with a lateral grating assisted lateral co-directional coupler (LGLC) tunable laser by using no additional complicated fabrication processes. The excess loss due to the DC-SSC is only 0.5 dB, and narrow full width half maximums (FWHMs) of vertical and horizontal far-field patterns (FFPs) produced by the laser are about 25° and 20°. This integration causes no degradations of the performance of the LGLC laser; in other words, it maintains good lasing characteristics, namely, wide tuning range of over 68 nm and SMSR of over 35 dB in the C-band under a 50 semi-cooled condition.