Title :
Finite-difference time-domain analysis of laser diodes integrated with tapered beam-expanders
Author :
Takahashi, Masaharu ; Ohtoshi, T.
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
fDate :
5/1/1999 12:00:00 AM
Abstract :
Waveguide properties of laser diodes integrated with horizontally tapered beam-expanders are analyzed by the finite-difference time-domain method. The taper length dependence of the radiation loss and fiber-coupling efficiency are clarified. Lower loss and higher fiber-coupling efficiency are achieved in the exponentially tapered beam-expander compared with a linearly tapered one having an equivalent length.
Keywords :
finite difference time-domain analysis; integrated optics; laser theory; optical transmitters; semiconductor device models; semiconductor lasers; equivalent length; fiber-coupling efficiency; finite-difference time-domain analysis; finite-difference time-domain method; horizontally tapered beam-expanders; laser diodes; linearly tapered; radiation loss; taper length dependence; tapered beam-expanders; waveguide properties; Diode lasers; Finite difference methods; Optical fiber losses; Optical modulation; Optical propagation; Optical reflection; Optical refraction; Optical variables control; Optical waveguides; Time domain analysis;
Journal_Title :
Photonics Technology Letters, IEEE
