Edge interference filter for optical communications...

Details Edge interference filter for optical communications... Edge interference filter for optical communications...

G - Physics

02

B

88/114, 363/2

G02B 5/28 (2006.01)

Patent

CA 1272900

ABSTRACT OF THE DISCLOSURE An edge interference filter transmitting short-wave for great interchannel spacing of about 200nm given an attenuation band wavelength of about 1300nm. The filter is composed of a layer sequence of a total of 23 alternately high and low refractive index layers wherein the high index of refraction layers have an index of refraction of 2.08 and the low index of refraction layers have an index of approximately 1.45, the effective optical layer thickness of the individual layers is standardized to a 20° angle of incidence and to 1/4 wavelength of the attenuation band center wavelength of 1260nm with to layers 1 and 23 having a thickness of 1.146, layers 2 and 22 having a thickness of 0.909, layers 3 and 21 having a thickness of 1.039, layers 4 and 20 having a thickness of 0.932 and layers 5-19 having a thickness of 1.

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