G - Physics
02
B
G02B 5/22 (2006.01) G02B 6/02 (2006.01) G02B 6/34 (2006.01)
Patent
CA 2110470
ABSTRACT OF THE DISCLOSURE 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.Er/.alpha.Tm between a contribution .alpha.Er of Er to attenuation and a contribution .alpha.Tm of Tm to attenuation is set in a range from about 1 to 1/25 for a 1.5 µm band range, whereby attenuation in this wavelength range is retained above 50 dB/m to realize required cutoff function.
Kanamori Hiroo
Kashiwada Tomonori
Sankawa Izumi
Urano Akira
Marks & Clerk
Nippon Telegraph And Telephone Corporation
Sumitomo Electric Industries Ltd.
LandOfFree
Optical filter 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, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical filter will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2001984