Coherent light generators – Particular active media – Semiconductor
Patent
1990-06-07
1991-12-17
Epps, Georgia
Coherent light generators
Particular active media
Semiconductor
372 46, 372 26, 372 28, H01S 319
Patent
active
050738925
ABSTRACT:
A semiconductor laser device of the field modulation type includes a structure in which the threshold carrier density for laser oscillation is reduced so as to enable an effective action of a modulated electric field applied externally on an active region for radiating light, thereby enabling an extremely high speed modulation. A quantum structure which does not fulfill the charge neutrality condition for free-carriers or a strained super lattice structure is adopted as the structure in which the threshold carrier density is reduced.
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Chinone Naoki
Ohtoshi Tsukuru
Sasaki Shinji
Tsuchiya Tomonobu
Uomi Kazuhisa
Epps Georgia
Hitachi , Ltd.
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