Low-cost doppler frequency shift measuring device

Details Low-cost doppler frequency shift measuring device Low-cost doppler frequency shift measuring device

2005-03-17

2008-09-09

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

C356S028500

Reexamination Certificate

active

07423736

ABSTRACT:
The invention relates to a Doppler frequency shift measuring device of the optical type comprising an optical signal channel delivering, through a polarization-splitting coupler, through a bidirectional signal port of the coupler, a signal light beam illuminating a reference medium, the coupler receiving, through said bidirectional port, a backscattered light beam returned by the reference medium; a reference channel providing a reference light beam for detection of the Doppler frequency shift, the frequency shift being determined by the frequency shift between the light signal illuminating the reference medium and the light beam returned by the reference medium. The reference light beam is applied to a reference port of the polarization-splitting coupler, said coupler delivering, at a port, a beat signal between the frequency of the reference light beam applied to the port and the frequency of the backscattered light beam applied to the port, possibly containing the Doppler shift.

REFERENCES:
patent: 4818071 (1989-04-01), Dyott
patent: 4902127 (1990-02-01), Byer et al.
patent: 5365335 (1994-11-01), Sorin
patent: 6002480 (1999-12-01), Izatt et al.
patent: 6608669 (2003-08-01), Holtom
patent: 6992776 (2006-01-01), Feldchtein et al.
patent: 2003/0151732 (2003-08-01), Rogers et al.
patent: 2 761 162 (1998-09-01), None
James S W et al: “Fibre Optic Based Reference Beam Laser Doppler Velocimetry” Optics Communications, North-Holland Publishing Co. Amsterdam, NL Sep. 15, 1995.

Affiliated with

Also associated with

Rating

Low-cost doppler frequency shift measuring device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low-cost doppler frequency shift measuring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-cost doppler frequency shift measuring device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3982082