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The EagleEye Optical Spectrum Analyzer (OSA) is a compact unit for measuring spectral characteristics of cw lasers. The Eagle-Eye, like any other conventional OSA device, can analyze a laser spectrum by scanning it’s cavity.
This approach has a resolution limited by the EagleEye’s cavity finesse, which is in the order of some MHz.
The EagleEye devices surpass this limit by using a lock, loose and look procedure. Using this approach, a much higher resolution for laser linewidths is achieved. Laser linewidths as low as 20 kHz are resolved.



  • fully automated linewidth measurement of cw-single frequency lasers
  • rms-value, power spectral density, time series & Allan deviation measurements
  • possibility for intensity noise (RIN) measurements
  • open source LabView program

EgleEye - Dimensions

All Dimensions in mm. Specifications are subject to change without notice.

Literature & Downloads


  • 1.5 GHz Free Spectral Range
  • Maximum Finesse > 300
  • INVAR® construction
  • User-Interchangeable Optic Sets
  • Broadband Coatings (Standard: 500 nm .. 1100 nm)
  • Integrated Mount for Neutral Density Filters Laser


  • Visible 300 nm – 1100 nm
  • Infrared 800 nm – 2600 nm
  • Bandwidth 300 kHz
  • Integrated Variable Gain Amplifier
  • Single Connector to Controller Rack


  • DSP Based Controller Board
  • Full Speed USB 2.0 port
  • Sampling Rate Up to 250 kHz
  • Recording Times 1 s, 100 ms, 60 ms
  • Optional External Control of Piezo Voltage


  • Laser Linewidth Resolution Limit < 20 kHz / 100 msec
  • LabVIEW Based Control Software
  • Immediate Calculation of Laser Linewidth
  • Fourier Transform of Frequency Noise
  • Intuitive Operation


Please contact us for details