Title :
Ultra-narrow spectral linewidth photodetector based on taper cavity
Author :
Huang, Hui ; Huang, Yongqing ; Ren, Xiaomin
Author_Institution :
Beijing Univ. of Posts & Telecommun., China
Abstract :
Taper-cavity based photodetectors are demonstrated. The taper-cavity shows a nonresonant effect but exhibits a remarkable absorption enhancement effect, and the wavelength selectivity of the device was decided solely by the filtering-cavity. Thus, high-speed, high quantum efficiency and ultra-narrow spectral linewidth can be achieved simultaneously. An integrated device with quantum efficiency of 75% and spectral linewidth of 0.8 nm (FWHM) was fabricated, and the absorption layer thickness is 0.119 μm.
Keywords :
Fabry-Perot resonators; cavity resonators; integrated optoelectronics; optical communication equipment; photodetectors; spectral line breadth; tuning; 0.119 micron; 75 percent; absorption enhancement effect; absorption layer thickness; filtering cavity; high quantum efficiency; high-speed operation; integrated device; nonresonant effect; taper-cavity based photodetectors; ultra-narrow spectral linewidth; wavelength selectivity; wide tuning range;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030109
