If we build up a mid-infrared laser system and want to measure its spectra, where can I find the lowest-cost mid-infrared spectrometer, ranging from 2 to 20 μm。 Any recommendation? Thanks!
A FTIR spectrometer might work. There are some 'low cost', modest resolution FTIR systems that might do the job.
Spectral Products supplies a 1.5 - 5.0µm spectrometer (10-30 nm resolution). Alternatively, there are more pricy spectrum analyzers from e.g. Bristol Instruments (1-12 μm), NLIR (7.6-12 μm), or A.P.E. (0.2 - 6.3 μm).