Title :
Attenuation inner-window in the amplifier- and modulator-integrated laser diode
Author :
Kim, In ; Bae, Yu-Dong ; Kang, Byung-Kwon ; Park, Byeonghoon ; Lee, Sang-Moon ; Kim, Young Hyun ; Jang, Dong-Hoon
Author_Institution :
Telecommun. R&D Center, Samsung Electron. Co., Gyeonggi-do, South Korea
Abstract :
To better control the input power of an amplifier, which is monolithically integrated with an electroabsorptive-modulated laser, an inner window is implemented by removing a section of the waveguide to realize an attenuator. It also reduces the effect of amplified spontaneous emission on the integrated laser. Attenuation around -10 dB is obtained by adjusting the length of the inner window. Because of different focal depths, unguided stray light from the inner window is not coupled to a fiber on which the amplifier output is focused through a lens.
Keywords :
electro-optical modulation; electroabsorption; integrated optics; laser beams; lenses; optical attenuators; semiconductor optical amplifiers; superradiance; waveguide lasers; amplified spontaneous emission; amplifier-integrated laser; attenuator; electroabsorptive-modulated laser; focal depths; inner window; input power; integrated laser; lens; modulator-integrated laser diode; monolithic integration; unguided stray light; waveguide; Diode lasers; Fiber lasers; Optical attenuators; Optical control; Optical coupling; Power amplifiers; Power lasers; Spontaneous emission; Stray light; Waveguide lasers; 65; Attenuators; distributed feedback lasers; monolithic integrated circuits; photodetectors; semiconductor optical amplifiers;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2004.837786
