Sanyo Electric Co., Ltd.

Takatoshi Ikegami

Yasuyuki Bessho

Masayuki Shono

Shoji Honda

Nobuhiko Hayashi

Mitsuaki Matsumoto

Daisuke Ide

Takenori Goto

Akira Ibaraki

Koutarou Furusawa

Keiichi Yodoshi

Toru Ishikawa

Teruaki Miyake

Kenichi Matsukawa

Atushi Tajiri

Ryoji Hiroyama

Hiroyuki Kase

A semiconductor laser with a self-sustained pulsation is disclosed in which a first cladding layer of first conductive type, an active layer and a second cladding layer of second conductive type having a striped ridge are formed in that order on a semiconductor substrate of first conductive type. The first and second cladding layers have a refractive index smaller than and a band gap larger than the active layer. A saturable optical absorbing layer having a band gap of energy substantially equal to the energy corresponding to lasing wavelength is formed in both the first and second cladding layers. Further, a barrier layer having a refractive index smaller than and a band gap larger than the first and second cladding layers is formed between the first cladding layer and the active layer and/or between the active layer and the second cladding layer.

Semiconductor laser with a self sustained pulsation

A semiconductor laser device according to the present invention comprises a GaAs substrate of a first conductivity type, a cladding layer of the first conductivity type formed on one main surface of the substrate, an active layer having a quantum well structure in which a tensile strain quantum well layer and a quantum barrier layer which are formed on the cladding layer of the first conductivity type are alternately laminated, and a cladding layer of a second conductivity type formed on the active layer. The one main surface of the substrate is a surface misoriented by 9.degree. to 17.degree. from a {100} plane of the substrate in a &lt;011&gt; direction, and the cavity length is not less than 150 .mu.m nor more than 300 .mu.m.

Semiconductor laser device with a misoriented substrate

Method of making a semiconductor laser with a self-sustained pulsation

Semiconductor laser with a self-sustained pulsation

Growing community of inventors

Moriguchi, Japan

Takatoshi Ikegami