Abstract
We theoretically investigate a 25 GHz multichannel filter based on ring cavity birefringent optical interleaver for dense wavelength division multiplexing (DWDM) transmission systems. The simulation tool used in this work is the Advanced System Analysis Program (ASAP) optical modeling software. We improve the dispersion performance by employingλ/6 andλ/4 wave plates as birefringent compensators for interleavers. The new structure exhibits a high performance with nearly zero ripple, a channel isolation greater than 102 dB, and a passband utilization of 86% within the C-band. The research results illustrate that our modified scheme can improve the dispersion of more than 76.6% in comparison with the previous studies of optical interleaver with birefringent crystal and ring cavity structures.
Highlights
In the recent years, with the rapid growth of internet and the maturity of multimedia conferencing, dense wavelength division multiplexing (DWDM) [1, 2] has emerged as a vital component for optical fiber networks
We theoretically investigate a 25 GHz multichannel filter based on ring cavity birefringent optical interleaver for dense wavelength division multiplexing (DWDM) transmission systems
We improve the dispersion performance by employing λ/6 and λ/4 wave plates as birefringent compensators for Sagnac-interferometer-based flat-top birefringent optical interleaver employing a ring cavity as a phase-shift element, which was proposed by Lee et al [10]
Summary
With the rapid growth of internet and the maturity of multimedia conferencing, dense wavelength division multiplexing (DWDM) [1, 2] has emerged as a vital component for optical fiber networks. One way to increase the channels number is to widen the usable wavelength bandwidth in low-loss region of the used single-mode fiber [4, 5]. Another way to increase the channels number is to narrow the channel spacing. An optical interleaver has been verified as an effective technique in increasing channel counts by doubling or quadrupling the number of optical channels when the channel spacing is in the range of 0.2 nm (25 GHz). We improve the dispersion performance by employing λ/6 and λ/4 wave plates as birefringent compensators for Sagnac-interferometer-based flat-top birefringent optical interleaver employing a ring cavity as a phase-shift element, which was proposed by Lee et al [10]. The interleaver design model is configured based on the actual component parameters
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