Using GPT-5.6 to simulate optical crosstalk: channel interleaving required
jwt0625 · x · 2026-08-22
The author experimented with optical signal crosstalk using code generated by GPT-5.6 (via web chat UI).
The simulation involved 70 GHz FWHM MRMs and 100 GBaud NRZ signals, comparing four channel spacing scenarios (ideal, 150GHz, 200GHz, 400GHz) and four signal configurations (-6dBm/-10dBm with/without FFE). The model initially struggled with naive Gaussian fits for BER calculation, requiring multiple prompts to switch to multi-step sampling and threshold optimization. The key conclusion: you must interleave the channels to avoid interference.
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