Kabushiki Kaisha Toshiba

Makoto Ohashi

Hideto Furuyama

Yuzo Hirayama

Kazuhiro Inoue

Masaki Tohyama

Keiji Takaoka

Motoyasu Morinaga

Masahisa Funemizu

A laser diode assembly capable of guiding a laser beam to a predetermined direction by utilizing a reflecting surface which has an arbitrary angle with respect to a sub-mount. The assembly includes a first unit, a second unit, and a laser diode. The first unit has a first surface and a mounting surface inclined to the first surface. The second unit is made of a semiconductor substrate and is on the first unit. The second unit has a second surface and a reflecting surface that coincides with a (111) surface of the semiconductor substrate inclined to the second surface. The laser diode is on the second surface and irradiates a laser beam to the reflecting surface along a direction parallel to the second surface. The second unit is on the first unit in a manner that the second surface is disposed parallel to the mounting surface. thereby realizing an inclined angle of the reflecting surface with respect to the first surface of 45 degrees.

Laser diode assembly

A grating coupled surface emitting laser has a diffraction grating of a second or higher order for guided-mode light part of a waveguide region, and extract a beam in a direction perpendicular to the waveguide region. By narrowing a stripe of the waveguide region around the center, the phase of the diffraction grating is shifted to attain a Gaussian distribution for radiation-mode light in a cross section along the waveguiding direction.

Grating coupled surface emitting device

Growing community of inventors

Kanagawa-ken, Japan

Makoto Ohashi