Title :
An open-resonator model for the analysis of a short external-cavity laser diode and its application to the optical disk head
Author :
Kim, Jin-Yong ; Hsieh, H.C.
Author_Institution :
Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA
fDate :
4/1/1992 12:00:00 AM
Abstract :
Based on the open resonator theory, a model of a complex coupling coefficient suitable for the analysis of an ultrashort external-cavity laser diode is presented. It is shown that the effective reflectivity of the short external-cavity laser diode calculated by using this model is a function of the size of the laser-emitting area and is significantly influenced by the phase-modification factor as well as by the amplitude-reduction factor of the complex coupling coefficient. The calculated output power characteristics show good qualitative agreement with experimental observation. The necessary condition that the optical disk head using an external-cavity laser diode does not fail to detect the recorded signal for a broad range of flying height is also derived
Keywords :
laser beam applications; laser cavity resonators; optical disc storage; reflectivity; semiconductor junction lasers; amplitude-reduction factor; broad range; complex coupling coefficient; effective reflectivity; flying height; laser-emitting area; open resonator theory; open-resonator model; optical disk head; output power characteristics; phase-modification factor; recorded signal; short external-cavity laser diode; signal detection; Diode lasers; Laser modes; Laser theory; Magnetic heads; Optical coupling; Optical recording; Optical resonators; Power generation; Reflectivity; Signal detection;
Journal_Title :
Lightwave Technology, Journal of
