Nec Corporation

Nippon Telegraph and Telephone Corporation

Nippon Telegraph and Telephone Public Corporation

Shoichi Sudo

Tetsuhiko Ikegami

Hiroshi Yasaka

Kenichi Kubodera

Itaru Yokohama

Yoshihisa Sakai

Yuzo Yoshikuni

Ikuo Mito

Kohroh Kobayashi

A method of stabilizing the frequency of a semiconductor laser comprises stabilizing a time-dependent frequency fluctuation by utilizing an optical energy absorption medium including an isotope acetylene gas molecule. An apparatus for stabilizing the frequency of a semiconductor laser, comprises a semiconductor laser, an optical energy absorption medium, a photodetector and a control circuit as essential elements. The optical energy absorption medium includes an isotope acetylene molecule.

Method and apparatus for stabilizing frequency of semiconductor laser

A double-channel planar buried-heterostructure semiconductor laser diode (DC-PBH LD) has improved high frequency response characteristics due to lower p-n junction capacitance resulting from the interposition of a low carrier concentration blocking layer between p-n-p-n blocking layers of the DC-PBH LD structure.

Double-channel planar heterostructure semiconductor laser

Growing community of inventors

Tokyo, Japan

Tetsuhiko Ikegami