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772B-MIR Laser Spectrum Analyzer

Spectral analysis of pulsed IR and mid-IR lasers


Operation with CW and pulsed lasers

The 772B-MIR Laser Spectrum Analyzer combines proven Michelson interferometer technology with fast Fourier transform analysis to characterize the spectral properties of CW and pulsed lasers that operate from 1 to 12 μm.

When used with CW lasers, the model 772B-MIR operates and performs just like Bristol’s 771B-MIR Laser Spectrum Analyzer. What makes the 772B-MIR system unique is that it employs a sophisticated algorithm to enable the measurement of pulsed lasers that have a repetition rate as low as 50 Hz.

Pulsed laser operation

When used with pulsed lasers, a single scan of the Michelson interferometer does not generate an interferogram that is sufficient to convert to a spectrum. Therefore, data from a number of laser pulses are collected from multiple scans of the interferometer to “build” a more complete interferogram.

Spectral analysis and wavelength measurement

The 772B-MIR Laser Spectrum Analyzer
has a spectral resolution of 4 GHz and wavelength accuracy of ± 10 parts per million (± 0.08 nm at 8 μm). An optical rejection ratio of about 15 - 20 dB is achieved assuming a sufficient number of laser pulses (≥ 30,000) are used to generate the interferogram.

Straightforward operation

The 771 Laser Spectrum Analyzer operates with a PC connected directly by USB or through a local area network via Ethernet. Software is provided to control measurement parameters, display spectra, and to report wavelength data.

50Hz, 50ns, 5k, linear

Spectrum of QCL with a pulse rate of 50 Hz and a pulse length of 50 ns.

  • Operation from 1 to 12 μm
  • Spectral resolution of 4 GHz
  • Wavelength accuracy of ± 10 parts per million
  • Continuous calibration with a built-in wavelength standard
  • Optical rejection ratio as high as 20 dB
  • Free-space aperture input with visible alignment aid
  • Straightforward operation with a PC using USB or Ethernet
  • Display software provided to control measurement parameters, display spectra, and report wavelength data
  • Five-year warranty covers all parts and labor