Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1995-09-22
1998-04-14
Negash, Kinfe-Michael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359154, 359189, H04B 1000
Patent
active
057399379
ABSTRACT:
An optical unit for restoring a pulse pattern is described. The unit has an input for receiving a signal pulse series at a modulation period T and wavelength .lambda.hd p and comprises a pulsed laser for supplying a pulse series whose distance between two consecutive pulses is equal to n.T, in which n is an integer and is variable throughout the pulse series. Pulses of the signal pulse series can be injected into the pulsed laser. Moreover, the unit comprises at least a detection system arranged in the path of the radiation emitted by the pulsed laser, which system detects on the basis of a variation of a feedback-sensitive parameter of the laser.
REFERENCES:
patent: 4399564 (1983-08-01), Cowen
patent: 4980891 (1990-12-01), Izadpanah
patent: 5309269 (1994-05-01), Shibao
patent: 5373387 (1994-12-01), Bosch et al.
patent: 5568303 (1996-10-01), Liedenbaum et al.
"Clock extraction using saturable absorption in a semiconductor non-linear optical amplifier" by P.E. Barnsely et al in IEEE Photonics Technology Letters, vol. 3, No. 9, Sep. 1991, pp. 832-834.
Liedenbaum Coen T. H. F.
Reid John J. E.
Negash Kinfe-Michael
Tierney Daniel E.
U.S. Philips Corporation
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