Title :
Noise characteristics of high-frequency superposed laser diodes for optical disc systems
Author :
Ohishi, A. ; Chinone, N. ; Ojima, M. ; Arimoto, A.
Author_Institution :
Hitachi Ltd., Central Research Laboratory, Kokubunji, Japan
Abstract :
Excess noise peaks in an index-guided single-mode laser can be suppressed by superposing high-frequency current. By this method, index-guided lasers have stable noise characteristics and the noise level is about 7¿12 dB lower than that in gain-guided multimode lasers at output power of about 3 to 5 mW.
Keywords :
electron device noise; semiconductor junction lasers; HF current superposition; high-frequency superposed laser diodes; index-guided single-mode laser; noise characteristics; noise level; optical disc systems; semiconductor laser;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840558
