LNOI edge coupling dissected: double-taper coupler adds >2 dB, ~7 dB total IL
jwt0625 · x · 2026-10-18
The author dissects an unusually clean LNOI measurement curve with hard numbers: DFB-LNOI coupling via a double-taper edge coupler costs >2 dB (1.4 dB modal loss at perfect alignment plus 0.6 dB from air-LN index mismatch), with total insertion loss 7 dB. Cites Bassil2026's low-RIN hybrid InP-LNOI microwave photonic transmitter paper and compares measured LI curves before and after coupling to LNOI — a useful reference for photonic link loss budgeting.
Related event: DFB Laser Coupled to Thin-Film Lithium Niobate Chip Delivers up to 170mW(2 posts)→
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