Optical modulating and amplifying apparatus capable of achieving

Coherent light generators – Particular beam control device – Modulation

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

372 38, 359345, 359341, H01S 313

Patent

active

054794242

ABSTRACT:
An optical modulating and amplifying apparatus includes an optical amplifier and a modulator. In the apparatus, an input optical signal and an excited light are combined with each other to produce an output light signal. The excited light from a laser diode is sensed by a photodiode. The sense signal includes a bias and an amplitude to be respectively detected by a mean value sensor and a modulation signal sensor. A modulation degree of the excited light is computed by a divider. A control signal to develop a predetermined modulation degree is delivered from a control signal generator to a variable gain amplifier. In response to the control signal, the amplifier controls the amplitude of the oscillation signal from an oscillator. A laser diode driver adds a bias to the oscillation signal to drive the laser diode. The modulation degree is kept unchanged regardless of variation in an output level of the excited light so as to achieve the modulation with a high signal-to-noise ratio.

REFERENCES:
patent: 4789987 (1988-12-01), Fraser
patent: 4924470 (1990-05-01), Ries
patent: 5127015 (1992-06-01), Chikugawa et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Optical modulating and amplifying apparatus capable of achieving does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical modulating and amplifying apparatus capable of achieving, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical modulating and amplifying apparatus capable of achieving will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1374491

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.