What’s the current “best practice” laser source for compact Raman setups? (785 nm, single-frequency, ~100 mW)
I’m currently building a compact Raman spectroscopy setup for biological/organic samples and looking for recommendations for a stable CW laser source around 785 nm, ideally somewhere in the 80–120 mW range with single-longitudinal-mode (SLM) operation.
Main priorities are: narrow linewidth / stable spectral profile with minimal mode hopping during longer acquisitions, low intensity noise and a compact footprint since the system is intended to be integrated rather than purely bench-top
At first I was leaning toward more traditional larger Raman laser heads, but I’m starting to wonder whether modern compact OEM-style modules have reached the point where they’re stable enough for demanding spectroscopy work without sacrificing spectral quality.
I’ve looked into ECDLs, volume holographic grating stabilized diodes, and compact DPSS systems, but I’m still trying to understand what people are actually using successfully in real-world Raman setups nowadays.
For those working in Raman, hyperspectral imaging, or biomedical spectroscopy:
what architecture ended up being the most reliable long-term?
Would appreciate any recommendations and lessons learned 😃