Title :
DFB laser intermodulation distortion analysis taking longitudinal electrical field distribution into account
Author :
Okuda, Testuro ; Yamada, Hirohito ; Torikai, Toshitaka ; Uji, Toshio
Author_Institution :
Kansai Electron. Res. Lab., NEC Corp., Otsu, Japan
Abstract :
DFB laser intermodulation distortion were theoretically analyzed, taking longitudinal electrical field distribution in the laser cavity into account. The modulation distortion mechanism caused by longitudinal electrical field nonuniformity along the laser cavity was theoretically clarified. Furthermore, theoretical law distortion yields, which are decided by the uncontrollable grating phases at cleaved facets, were calculated for devices with various /spl kappa/L values and facet reflectivities, in order to obtain desirable design for the lasers used for subcarrier multiplexing.<>
Keywords :
distributed feedback lasers; electric fields; intermodulation; laser cavity resonators; optical modulation; reflectivity; semiconductor lasers; subcarrier multiplexing; DFB laser intermodulation distortion analysis; cleaved facets; design; facet reflectivities; laser cavity; law distortion yields; longitudinal electrical field distribution; modulation distortion mechanism; subcarrier multiplexing; uncontrollable grating phases; Fiber lasers; Frequency; Gratings; Intermodulation distortion; Laser modes; Laser noise; Laser theory; Optical design; Optical distortion; Reflectivity;
Journal_Title :
Photonics Technology Letters, IEEE
