Wavelength Demultiplexing and Optical Deflection in Variable Refractive-Index Waveguide Array Based on Selectively Grown GaInAs/InP MQW Structure(Optical Passive Devices and Modules, <Joint Special Section>Recent Progress in Optoelectronics and Communicat

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A GaInAs/InP multiple quantum well (MQW)-based wavelength demultiplexer composed of a waveguide array in which the refractive index varies across the array yielded successful results of wavelength demultiplexing and optical deflection. Since optical path length differences between waveguides in the array are achieved through refractiveindex differences controlled by the SiO_2 mask design in selective metal-organic vapor phase epitaxy (MOVPE), a straight waveguide grating can be formed with reduced optical propagation losses. A straight waveguide array device with a 1.4% refractive-index difference was fabricated. The fabrication of a preliminary wavelength demultiplexer was also achieved, for which a wavelength separation with an approximately 25nm spacing and free spectral range (FSR) of approximately 100nm were obtained. Moreover, an optical deflector was investigated and primitive deflection was achieved at 1460 and 1490nm incident wavelengths.
社団法人電子情報通信学会の論文
2005-05-01