Optical interleaver
AssigneeAgency for Science, Technology and Research
InventorsYing Zhang, Qi Jie Wang, Yeng Chai Soh
Life of this patent
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Abstract
An optical interleaver comprising a first optical 3×3 coupler for receiving a broadband optical signal at one input port thereof, a second 3×3 optical coupler, three differential delay lines connected in parallel port-to-port between output ports of the first optical 3×3 coupler and input ports of the second optical 3×3 coupler, an infinite impulse response (IIR) element disposed in each of two of the delay lines, and wherein optical signals travelling in the respective delay lines interfere at the second 3×3 coupler to produce three frequency shifted transmission channel output signals at respective output ports of the second 3×3 coupler.
Claims21
An optical interleaver comprising
- a first optical 3×3 coupler for receiving a broadband optical signal at one input port thereof,
- a second 3×3 optical coupler,
- three differential delay lines connected in parallel port-to-port between output ports of the first optical 3×3 coupler and input ports of the second optical 3×3 coupler,
- an infinite impulse response (IIR) element disposed in each of two of the delay lines, and
- wherein optical signals travelling in the respective delay lines interfere at the second 3×3 coupler to produce three frequency shifted transmission channel output signals at respective output ports of the second 3×3 coupler.
An optical interleaver comprising
- an optical 3×3 coupler for receiving a broadband optical signal at one port thereof on one side thereof,
- three differential delay lines connected to respective ports at the other side of the optical 3×3 coupler,
- an infinite impulse response (IIR) element disposed in each of two of the delay lines,
- an all-pass reflector element disposed in each delay line, and
- wherein optical signals travelling in the respective delay lines interfere at the 3×3 coupler to produce three frequency shifted transmission channel output signals at respective ports on the first side of the 3×3 coupler.
A method of filtering a broadband optical signal, the method comprising
- receiving the broadband optical signal at one input port of a first optical 3×3 coupler,
- coupling the broadband optical signal into three differential delay lines connected in parallel port-to-port between output ports of the first optical 3×3 coupler and input ports of a second optical 3×3 coupler,
- subjecting the coupled signals in two of the delay lines to an infinite impulse response (IIR) element, and
- interfering the coupled signals in the three delay lines at the second 3×3 coupler to produce three frequency shifted transmission channel output signals at respective output ports of the second 3×3 coupler.
A method of filtering a broadband optical signal, the method comprising
- receiving the broadband optical signal at one port of an optical 3×3 coupler,
- coupling the broadband optical signal into three differential delay lines connected to respective ports at the other side of the optical 3×3 coupler,
- subjecting the coupled signals in two of the delay lines to respective infinite impulse response (IIR) elements,
- reflecting the coupled signals in the three delay lines at respective all-pass reflector elements, and
- interfere the coupled signals in the three delay lines at the 3×3 coupler to produce three frequency shifted transmission channel output signals at respective ports on the first side of the 3×3 coupler.
Dependencies are inferred from the claim text.