DFB laser array wavelength locking improves from ±12.5 GHz to ±3.5 GHz, but power curves are missing
jwt0625 · x · 2026-10-08
- A thread discusses the Levy2026 paper on a precision wavelength-spacing controller for continuous control of a DFB laser array: an extra knob locks relative wavelengths of the DWDM grid — though only relative, not absolute wavelengths — at notable extra cost and engineering effort.
- Progress: at OFC earlier this year the team showed a 200 ± 15 GHz bare DFB array locked to a reference ring FSR at ± 4 GHz; wavelength control has now tightened from ± 12.5 GHz to ± 3.5 GHz.
- The poster questions the demo methodology: why no power curves when playing with temperature, arguing key validation data is missing.
Related event: DFB Laser Array Wavelength Locking Tightened to ±3.5GHz(2 posts)→
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