The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2009
Filed:
Feb. 09, 2007
Takashi Hiraga, Osaka, JP;
Nobutaka Tanigaki, Osaka, JP;
Noritaka Yamamoto, Osaka, JP;
Toshiko Mizokuro, Osaka, JP;
Ichiro Ueno, Osaka, JP;
Norio Tanaka, Tokyo, JP;
Hiroshi Nagaeda, Hokkaido, JP;
Noriyasu Shiga, Hokkaido, JP;
Takashi Hiraga, Osaka, JP;
Nobutaka Tanigaki, Osaka, JP;
Noritaka Yamamoto, Osaka, JP;
Toshiko Mizokuro, Osaka, JP;
Ichiro Ueno, Osaka, JP;
Norio Tanaka, Tokyo, JP;
Hiroshi Nagaeda, Hokkaido, JP;
Noriyasu Shiga, Hokkaido, JP;
Abstract
A flip-flop circuit of the present invention includes a first switch and a second switch which are connected in series to each other. The first switch includes: two input ports upon which light source light and signal light are incident; two output ports for outputting an optical output; and a thermal lens forming element for forming a thermal lens in a predetermined optical inputting condition. Although the second switch is composed in the same manner as that of the first switch, a relation between the wave-lengths to be utilized is inverted. When a state is changed from OFF to ON, a pulse signal is inputted for setting and one of the rays of output light of the second switch is fed-back to the first switch so as to maintain the state of ON. When the state is changed from ON to OFF, a pulse of additional signal light is inputted. Due to the foregoing, the two states of ON and OFF can be stably maintained.