Optical filter doped with rare earth elements and used with opti

Details Optical filter doped with rare earth elements and used with opti Optical filter doped with rare earth elements and used with opti

1993-12-01

1995-06-06

Healy, Brian

Optical waveguides

Accessories

Attenuator

385 27, 385 31, 385 39, 385 49, 385141, 385142, 385144, G02B 622, G02B 624

Patent

active

054229758

ABSTRACT:
An object of this invention is to provide an optical filter which has higher mass-producibility and economy. This feature can be realized by doped a rare earth element into the region made of a glass material which can transmit light. In a case that Er and Tm are doped as the rare earth element into the region, a ratio .alpha..sub.Er /.alpha..sub.Tm between a contribution .alpha..sub.Er of Er to attenuation and a contribution .alpha..sub.Tm of Tm to attenuation is set in a range from about 1 to 1/25 for a 1.5 .mu.m band range, whereby attenuation in this wavelength range is retained above 50 dB/m to realize required cutoff function.

REFERENCES:
patent: 4482204 (1984-11-01), Blyler, Jr. et al.
patent: 4637025 (1987-01-01), Snitzer et al.
patent: 4782491 (1988-11-01), Snitzer
patent: 4815079 (1989-03-01), Snitzer et al.
patent: 5067789 (1991-11-01), Hall et al.
patent: 5121460 (1992-06-01), Tumminelli et al.
patent: 5131069 (1992-07-01), Hall et al.
patent: 5216728 (1993-06-01), Charlton et al.
patent: 5257335 (1993-10-01), Kurata et al.
patent: 5276701 (1994-01-01), Shirasaki
patent: 5325459 (1994-06-01), Schmidt
Patent Abstracts of Japan, vol. 12, No. 461 (E-689), Dec. 5, 1988, JP-A-63 184 386 (Furukawa Electric, Jul. 29, 1988.

Affiliated with

Also associated with

Rating

Optical filter doped with rare earth elements and used with opti 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 filter doped with rare earth elements and used with opti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical filter doped with rare earth elements and used with opti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-993515