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Thorlabs: new Fourier Transform Optical Spectrum Analyzer for free-space and fibre-coupled inputs 3.3 - 8.0 µm

STN012216 xl

  • Dual-Function Broadband Spectrometer and Wavelength Meter
  • Five Models Support Wavelengths from 350 nm to 8.0 µm
  • Includes Laptop with Pre-Installed Software for Data Collection and Analysis

Thorlabs' Optical Spectrum Analyzers (OSAs) perform highly accurate measurements of the spectra of unknown light sources. The new model OSA206 has just been released, covering the 3.3 - 8.0 µm (3030 - 1250 cm-1) region.

These compact instruments suit a wide range of applications, such as analyzing the spectrum of a telecom signal, resolving the Fabry-Perot modes of a gain chip, and identifying gas absorption lines in a spectral measurement.

Many commonly available OSAs use grating-based monochromators, which have slow acquisition times due to the need to mechanically scan the grating and average out noise at each wavelength. Thorlabs' OSAs acquire the spectrum via a Fourier transform using a scanning Michelson interferometer in a push/pull configuration. This approach dramatically improves the acquisition time, enables a high-precision wavelength meter mode with ±1 part-per-million accuracy (i.e., 7 significant figures), and allows the included software to provide robust statistical analysis of the acquired spectra. 

All of Thorlabs' OSAs are compatible with FC/PC-terminated fiber patch cables. Custom designs for other fiber input receptacles are available by contacting Tech Support. In addition, the OSA203B, OSA205, and OSA206 can directly accept a collimated free-space optical input with a Ø6 mm maximum beam size, as detailed in the Free-Space Coupling tab. For wavelengths above 2 µm, we recommend single modeor multimode fluoride patch cables with cores up to Ø100 µm.

The instruments are designed to measure CW light sources but also work in some applications where a pulsed light source is used; details may be found on the Pulsed Sources tab. Please contact Tech Support to discuss custom fiber connectors and pulsed light source applications.

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