Open AccessFabrication of Butt‐Coupled SGDBR Laser Integrated with Semiconductor Optical Amplifier Having a Lateral Tapered Waveguide
Author(s) -
Oh Su Hwan,
Ko Hyunsung,
Kim Ki Soo,
Lee JiMyon,
Lee Chul Wook,
Kwon Oh Kee,
Park Sahnggi,
Park Moon Ho
Publication year - 2005
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.05.0905.0003
Subject(s) - materials science , optics , laser , optical amplifier , optoelectronics , waveguide , planar , fiber bragg grating , distributed bragg reflector , semiconductor laser theory , semiconductor , physics , wavelength , computer graphics (images) , computer science
We have demonstrated a high‐power widely tunable sampled grating distributed Bragg reflector (SGDBR) laser integrated monolithically with a semiconductor optical amplifier (SOA) having a lateral tapered waveguide, which is the first to emit a fiber‐coupled output power of more than 10 dBm using a planar buried heterostructure (PBH). The output facet reflectivity of the integrated SOA using a lateral tapered waveguide and two‐layer AR coating of TiO 2 and SiO 2 was lower than 3 × 10 −4 over a wide bandwidth of 85 nm. The spectra of 40 channels spaced by 50 GHz within the tuning range of 33 nm were obtained by a precise control of SG and phase control currents. A side‐mode suppression ratio of more than 35 dB was obtained in the whole tuning range. Fiber‐coupled output power of more than 11 dBm and an output power variation of less than 1 dB were obtained for the whole tuning range.