Title:
周波数シンセサイザ
Document Type and Number:
Japanese Patent JP4072053
Kind Code:
B2
Abstract:
A frequency synthesiser for generating wideband signals for zero Hz up to frequencies in the millimetre wave band provides the ability for arbitrarily fine increments in output frequency. The synthesiser has an optical comb generator that provides a set of reference signals at predetermined intervals. These reference signals are fed to two or more laser devices, at least one of which is a frequency selection and translation device capable of selecting a particular output line from the comb generator and shifting it by some desired frequency. The outputs from the laser devices are then combined and detected using a photodetector. The output from this is the system output. Various methods of producing the frequency selection and translation device are disclosed, as are various methods of producing the optical comb reference signal. Some possible applications of the invention are also disclosed.
Inventors:
Watson, Christopher David
Seeds, Allwin Jiyoung
Seeds, Allwin Jiyoung
Application Number:
JP2002536705A
Publication Date:
April 02, 2008
Filing Date:
October 15, 2001
Export Citation:
Assignee:
Kinetic Limited
International Classes:
G02F2/02; H03B21/02
Domestic Patent References:
| JP2000275107A |
Other References:
K.Shimizu, et.al.,Continuous-Wave Laser Frequency Synthesizer with a 100 GHz Tuning Range and a high Absolute Frequency Stability,Proceedings of 19th European Conference on Optical Communication (ECOC'93),1993年 9月16日,Vol.3,pp.93-96
L.N.Langley, et.al.,Packaged Semiconductor Laser Optical Phase-Locked Loop (OPLL) for Photonic Generation, Processing and Transmission of Microwave ,IEEE Transactions on Microwave Theory and Techniques,1999年 7月,Vol.47, No.7,pp.1257-1264
L.N.Langley, et.al.,Packaged Semiconductor Laser Optical Phase-Locked Loop (OPLL) for Photonic Generation, Processing and Transmission of Microwave ,IEEE Transactions on Microwave Theory and Techniques,1999年 7月,Vol.47, No.7,pp.1257-1264
Attorney, Agent or Firm:
Yoshio Kawaguchi
Mitsuru Inoue
Akio Ichiiri
Makoto Ono
Katsuma Osaki
Mitsuaki Tsubokura
Mitsuru Inoue
Akio Ichiiri
Makoto Ono
Katsuma Osaki
Mitsuaki Tsubokura