Apparatus and method of making a fused dense wavelength-division

Details Apparatus and method of making a fused dense wavelength-division Apparatus and method of making a fused dense wavelength-division

1997-02-12

1998-09-15

Ullah, Akm E.

Optical waveguides

With optical coupler

Particular coupling structure

G02B 0000

Patent

active

058091904

ABSTRACT:
The present invention relates to an apparatus and method of making a Dense Wavelength-Division Multiplexer (DWDM) using a Fused-Biconical Taper ("FBT") technique. The DWDM according to the present invention comprises a multiple of Multi-window Wavelength-Division Multiplexers ("MWDMs") which cascade together in several stages, each stage has several MWDMs having an identical window spacing. For a N-channel DWDM, there are 2.sup.m-1 MWDMs cascaded in m-th stage, and the window spacing of the m-th stage MWDMs is 2.sup.m-1 .DELTA..lambda., where m is from 1 to (logN/log2), for example, the first stage (m=1) having 1 MWDM and the window spacing is .DELTA..lambda., the second stage (m=2) having 2 MWDMs and the window spacing is 2 .DELTA..lambda., the third stage(m=3) having 4 MWDMs and the window spacing is 4.DELTA..lambda., etc., and the (logN/log2)-th stage has (N/2) MWDMs with a window spacing (N/2).DELTA..lambda.. The number N could be 2, 4, 8, 16 or more.

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patent: 5583683 (1996-12-01), Scobey
patent: 5664037 (1997-09-01), Weidman

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