G - Physics – 01 – M
Patent
G - Physics
01
M
G01M 11/00 (2006.01) G01J 3/26 (2006.01) G02B 6/26 (2006.01) H01S 3/098 (2006.01) H01S 5/00 (2006.01)
Patent
CA 2049849
- 15- MODE PARTITION SCREENING APPARATUS Abstract Accurate mode partition data from a laser are collected simply and rapidly in accordance with the principles of the invention wherein the laser output is directed to a filter which separates a central longitudinal mode from the side modes. The filter operates to present all side modes in a predetermined wavelength range simultaneously and continuously at the output of the filter. By subsequently comparing the intensity or power in the side modes delivered to the filter output with a predetermined threshold, it is possible to determine the frequency of occurrence and magnitude of mode partition events for side modes in the predetermined wavelength range. In one exemplary embodiment, the filter is realized by the combination of a Fabry-Perot etalon, whose longitudinal axis is angled with respect to the longitudinal axis (propagation axis) of the laser output beam directed onto the filter, together with an external reflector which is parallel to the Fabry-Perot etalon to permit multi-passing of the beam between the Fabry-Perot etalon and the reflector. The beam is reflected by the Fabry-Perot etalon so that after two or more passeswithin the filter only the side modes are output by the filter. In this arrangement, the filter acts as a notch filter having a wide passband and having an output for the side modes which is separate from an output for the main mode.
Magill Peter D.
Reichmann Kenneth C.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
LandOfFree
Mode partition screening apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mode partition screening apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mode partition screening apparatus will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1877308