G - Physics – 02 – F
Patent
G - Physics
02
F
345/56
G02F 1/00 (2006.01) H03K 17/78 (2006.01) H04B 10/142 (2006.01)
Patent
CA 2015039
ABSTRACT OF THE DISCLOSURE In ultrashort optical pulse modulating equipment optical pulses emitted from a laser in synchronism with input electrical signals are modulated by the electrical signals, the modulated optical pulses are applied to a first-stage pulse interval compressor, in which they are alternately distributed, one by one, by an optical switch to two optical fiber delay lines, two modulated optical pulses delayed by the two optical fiber delay lines are brought close to each other, and modulated optical pulse groups, each composed of two closely spaced modulated optical pulses, are output from an optical coupler. Also in the next-stage pulse interval compressor the modulated optical pulse groups input thereinto are alternately distributed, one by one, by an optical switch to two optical fiber delay lines, in which predetermined delays are caused in the modulated optical pulse groups, respectively, and then they are coupled together by an optical coupler, thereby creating modulated optical pulse groups each composed of four modulated optical pulses. In this way, modulated optical pulse groups are applied to n cascade-connected pulse interval compressors one after another, in which they are brought close to each other two by two and then coupled together, thereby producing modulated optical pulse packets compressed as desired.
Shimazu Yoshihiro
Tsukada Masato
Kirby Eades Gale Baker
Nippon Telegraph And Telephone Corporation
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