Title:
光クロック抽出装置及び方法
Document Type and Number:
Japanese Patent JP4807514
Kind Code:
B2
Abstract:
An optical clock extracting device for generating an optical pulse having an oscillation frequency synchronizing with the reference frequency of an incident signal light. The optical clock extracting device comprises a mode-locked semiconductor laser which has a saturable absorption region producing a phase modulation effect based on a control voltage applied to the saturable absorption region and a gain region and in which the oscillation frequency to generate an optical pulse can be varied, an optical mixer section for optically synchronously detecting the synchronization error between the reference frequency of the signal light and the oscillation frequency of the output optical pulse of the mode-locked semiconductor laser and thereby generating a phase error signal, and a phase-locked loop for negatively feed-backing the phase error signal to the saturable absorption region.
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Inventors:
Yoichi Hashimoto
Application Number:
JP2006510504A
Publication Date:
November 02, 2011
Filing Date:
February 28, 2005
Export Citation:
Assignee:
NEC
International Classes:
H01S5/065; G02F1/015; H01S5/50; H04B10/07; H04B10/2507; H04B10/516; H04B10/556; H04B10/61; H01S5/06
Domestic Patent References:
| JPH07287264A | 1995-10-31 | |||
| JP2003167281A | 2003-06-13 | |||
| JPH08340154A | 1996-12-24 |
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata
Ishibashi Masayuki
Masaaki Ogata