![]() Thorlabs' OSA20xC spectrum analyzers are optimized to cover five different spectral ranges with a spectral resolution of 7.5 GHz (0.25 cm -1) and a 30 dB optical rejection ratio. Each Redstone OSA includes a frequency-locked 1532.8323 nm reference laser, resulting in a spectral accuracy down to ☐.2 ppm. A frequency-stabilized 632.9918 nm HeNe alignment laser is included in each OSA20xC unit, which is used to ensure a spectral accuracy of ☒ ppm. This approach enables a high-precision Wavelength Meter mode with seven significant figures and ☑ part-per-million (ppm) spectral precision, allows robust statistical analysis of the acquired spectra, and provides broadband spectral measurements with every scan. ![]() Our optical spectrum analyzers acquire the spectrum via Fourier transform, using a scanning Michelson interferometer. We offer two instrument types: the general-purpose OSA20xC instruments, which have a high update rate and moderate resolution, and the high-performance Redstone ® OSA30x instruments, which have a high dynamic range and high resolution. Compatible with fiber-coupled and free-space light sources, these benchtop instruments suit a wide variety 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. Thorlabs' Optical Spectrum Analyzers (OSAs) perform highly accurate spectral measurements.
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