Claims
- 1. A laser Doppler velocimeter comprising:
An optical fiber source of low power comprising: an optical fiber output port; a bi-directional optical transmitter-receiver comprising: an optical input-output port for transmitting a beam of radiation to be scattered at a predetermined location and for collection a portion of the scattered radiation: and an optical fiber input output port; an optical fiber waveguide assembly comprising an optical fiber waveguide input port coupled to said optical fiber output port and an optical fiber output port coupled to said optical fiber input-output port; a reference signal source: a detector comprising a detector optical fiber input port for receiving collected scattered radiation and a reference signal; and coupler means forming part of said waveguide assembly for transmitting at least a portion of the collected scattered radiation and a reference signal to the detector optical fiber input port.
- 2. A laser doppler velocimeter in accordance with claim
CHARACTERIZED IN THAT
said source of optical radiation comprises a master oscillator power amplifier optical fiber signal source.
- 3. A laser Doppler velocimeter in accordance with claim 2CHARACTERIZED IN THAT
said master oscillator is alternatively activated and deactivated to produce temporally long pulses.
- 4. A laser Doppler velocimeter in accordance with claim 1CHARACTERIZED IN THAT
the detector is an interference fringe counter.
- 5. A laser Doppler velocimeter in accordance with claim
CHARACTERIZED IN THAT
the detector is a Doppler frequency detector.
- 6. A laser Doppler velocimeter comprising:
an optical wave guide formed from optical fiber; an optical fiber amplifier for generating or amplifying a beam of laser radiation in the wave guide fiber; means for transmitting the beam of radiation through the wave guide fiber and out of the velocimeter to be scattered at a predetermined location; means for collecting a portion of the scattered radiation and passing the collected scattered radiation through at least a portion of the wave guide fiber; and means for measuring the collected scattered radiation.
- 7. The velocimeter of claim 6 further comprising means for continuously operating the laser.
- 8. The velocimeter of claim 6 further comprising means for alternatively activating and deactivating the laser.
- 9. The velocimeter of claim 6 further wherein the means for measuring the collected scattered radiation is a Doppler frequency detector.
- 10. The velocimeter of claim 6 further wherein the means for measuring the collected scattered radiation is an interference fringe detector.
RELATED APPLICATION
[0001] This application is a Continuation-in-Part of U.S. application Ser. No. 07/804,888, now U.S. Pat. No. 5,272,513.
Continuations (2)
|
Number |
Date |
Country |
Parent |
09702132 |
Oct 2000 |
US |
Child |
10334785 |
Jan 2003 |
US |
Parent |
08169129 |
Dec 1993 |
US |
Child |
09702132 |
Oct 2000 |
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
07804888 |
Dec 1991 |
US |
Child |
08169129 |
Dec 1993 |
US |