Burst-mode laser techniques

Details Burst-mode laser techniques Burst-mode laser techniques

1998-07-09

2001-04-17

Pascal, Leslie (Department: 2633)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S199200, C359S199200

Reexamination Certificate

active

06219165

ABSTRACT:

TECHNICAL FIELD
This invention relates to the art of controlling generated signals, and more particularly, to controlling a laser used for burst mode transmission in a passive optical network (PON).
BACKGROUND OF THE INVENTION
In prior art optical networks using continuous signal format, power control for the laser and end-of-life detection for the laser are performed independently, resulting in high cost and substantial power consumption. Moreover, when using a bursty signal format, no end-of-life detection was performed in prior art optical networks.
SUMMARY OF THE INVENTION
We have recognized that for optical networks using a bursty signal format power control for the laser as well as end-of-life detection for the laser can be combined, resulting in a savings in both cost and power consumption. This is achieved by employing a peak comparator which is supplied with an indication of the magnitude of a generated, e.g., laser, signal, and supplying different thresholds to the peak comparator in a time multiplexed manner, such as a first threshold which is used for performing power control and a second threshold which is used for performing end of life detection, on an alternative packet-by-packet basis. Thus, the first threshold is supplied for the duration of a first packet and the second threshold is used for the duration of a second packet. Additional thresholds and packets may be employed for other functions as desired by an implementor.


REFERENCES:
patent: 5285305 (1994-02-01), Cohen et al.
patent: 5469464 (1995-11-01), De Groote et al.
patent: 6140920 (2000-10-01), Roberts
T. Inoue et al: “Burst-mode CMOS LD driver IC for 156 Mbit/s transmission”, Electronics Letters: vol. 33, No. 9, Apr. 24, 1997.
N. Ishihara et al: “3.3V, 50Mb/s CMOS Transceiver for Optical Burst-Mode Communication”, 1997 IEEE International Solid-State Circuits Conference-1997 Digest of Technical Papers, vol. 40, ISSN 0193-6530/Paper FP 15.4.

Affiliated with

Also associated with

Rating

Burst-mode laser techniques does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Burst-mode laser techniques, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Burst-mode laser techniques will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2551003