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Report demonstrates a 4-channel dwdm dfb laser array with 0.873 nm spacing and >45 dB SMSR, suggesting improved optical performance.
We report a 4-channel DWDM DFB laser array using four-phase-shifted sampled Bragg grating and asymmetric twin-waveguide technologies, achieving 0.873 nm spacing, >45 dB SMSR, and >10 dB electro-absorption modulator extinction ratio.
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Sun et al. (2025) studied this question.
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