THIN FILM INTERLEAVER
First Claim
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1. A demultiplexer for use in fiber-optic CWDM applications, the demultiplexer comprising:
- a first stage that comprises a thin film interleaver, the thin film interleaver comprising a thin film portion being formed to exhibit a flat top frequency response, wherein the thin film portion passes a first group of channels to pass through the thin film portion while reflecting a second group of channels, each channel of the first group of channels being adjacent to a channel in the second group of channels; and
at least one subsequent stage that includes at least two interleavers for receiving the first and second group of channels.
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Abstract
A thin film interleaver device is disclosed. The thin film interleaver includes thin film optics. The thin film(s) are formed such that they reflect one group of wavelengths while allowing a second group of wavelengths to pass through the thin film(s). The thin film(s) exhibit a flat top frequency response across the channel bandwidths of the multiplexed signal for which the thin film filter is designed such that the thin film interleaver is less sensitive to wavelength drift and temperature variations.
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Citations
14 Claims
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1. A demultiplexer for use in fiber-optic CWDM applications, the demultiplexer comprising:
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a first stage that comprises a thin film interleaver, the thin film interleaver comprising a thin film portion being formed to exhibit a flat top frequency response, wherein the thin film portion passes a first group of channels to pass through the thin film portion while reflecting a second group of channels, each channel of the first group of channels being adjacent to a channel in the second group of channels; and
at least one subsequent stage that includes at least two interleavers for receiving the first and second group of channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of manufacturing a thin film interleaver for use in fiber-optic CWDM multiplexing and demultiplexing the method comprising:
forming a thin film portion on a dual fiber collimator having an input fiber and a reflection fiber, the thin film portion being formed to;
exhibit a flat top frequency response; and
separate channels input on the input fiber by allowing a first group of channels to pass through the thin film portion while reflecting a second group of channels into the reflection fiber each of the first group of channels being adjacent to a channel in the second group of channels. - View Dependent Claims (11, 12, 13, 14)
Specification