Optical Spectrum Analyser Review for 2019

optical spectrum analyser

An Optical Spectrum Analyzer (or OSA) is a precision instrument designed to measure and display the distribution of power of an optical source over a specified wavelength span. An OSA trace displays power in the vertical scale plus the wavelength within the horizontal scale.

The expanding field of optics related applications has generated an enormous variety of industries and organizations that require advanced optical spectral measurements for both R&D and manufacturing. These industries include telecommunications, electronic devices, healthcare, life science/medical research, security, sensing, microscopy, and gas/chemical analysis, and environmental monitoring.Some typical applications are:

  • characterization of light sources such as for instance lasers and light emitting diodes (LEDs)
  • testing of optical systems, for instance wavelength division multiplexing systems in optical fiber communications networks, where one may need certainly to test the optical powers of this different wavelength channels and measure signal-to-noise ratios.
  • measurements regarding the wavelength-dependent transmissivity or reflectivity of optical systems or devices by comparing spectra with and without the device
  • characterization of fiber amplifiers (e.g. telecom erbium-doped fiber amplifiers) when it comes to wavelength-dependent gain and noise figure


Finisar introduced its WaveAnalyzer™ 1500S/L High Resolution Optical Spectrum Analyzer made to inspect the spectral characteristics of optical channels when you look at the L-band of the telecommunications spectrum. This instrument has been developed for researchers and engineers dedicated to optical communication systems operating within the L-band as well as for manufacturing test applications on the production floor.

The new WaveAnalyzer 1500S/L is founded on heterodyne measurement technology and offers a resolution bandwidth of 180 MHz. It offers a high scan rate of four updates per second for full L-band scans or more to 10 updates per second for smaller range scans.

Much like the C-band version of the WaveAnalyzer 1500S, the brand new L-band unit also offers an integral web server which include a Graphical graphical user interface (GUI) and a credit card applicatoin Programming Interface (API). Additional analysis functions include Optical Signal to Noise Ratio (OSNR) measurements and Multi-Wavelength Analysis or Side Mode Suppression Ratio (SMSR) measurements.


The AQ6374 Wide Range Optical Spectrum Analyzer covers wavelengths from 350 to 1750 nm including visible lights (380 to 780 nm) additionally the telecommunication wavelengths. You will find 8 wavelength resolution settings: 0.05 to 10 nm

to enable the user to find the cost effective based on the device/system under test.

The wide measurable level range is from-80 to +20 dBm. This really is suitable to measure high power along with low power sources used in different fields of application. The ۪.05 nm wavelength accuracy can be maintained by the calibration making use of the built-in reference source of light or an external light source including HeNe laser and Argon source of light.

Function include:

  • WDM (OSNR) analysis
  • Optical Fiber Amplifier analysis
  • DFB-LD analysis
  • FP-LD (VCSEL) analysis
  • LED analysis
  • Spectral Width analysis
  • Notch Width analysis
  • SMSR analysis
  • PMD analysis
  • Optical Power analysis
  • Color analysis
  • Optical Filter analysis (PK, BTM, WDM-PK, WDM-BTM)
  • Go/No-Go Judgment


Thorlabs’ Optical Spectrum Analyzers (OSAs) perform highly accurate spectral measurements. Compatible with fiber-coupled and free-space light sources, these compact benchtop instruments suit a multitude of applications, such as for example analyzing the spectrum of a telecom signal, resolving the Fabry-Perot modes of a gain chip, and identifying gas absorption lines.

The Optical Spectrum Analyzers acquire the spectrum via Fourier transform, using a scanning Michelson interferometer in a push/pull configuration. This method enables a high-precision Wavelength Meter mode with seven significant figures and ۫ part-per-million accuracy, allows robust statistical analysis of the acquired spectra, and provides broadband spectral measurements with every scan. Details are offered within the Design tab.

Most of Thorlabs’ OSAs accept FC/PC-terminated fiber patch cables and collimated free-space beams up to ࡶ mm. Information on compatibility have been in the Specs and Free-Space Coupling tabs, respectively. For wavelengths from 2 µm to 5.5 µm, we offer fluoride single mode and fluoride multimode fiber patch cables. Optical Spectrum Analyzers with other fiber input receptacles can be obtained by contacting Tech Support.

These instruments are designed to measure CW light sources. They also operate in some applications where a pulsed light source can be used; details may be on the Pulsed Sources tab.

Our stock instruments are not made for applications where it’s important to recover small signals, including fluorescence detection and Raman spectroscopy. When your application would take advantage of increased detection sensitivity, please relate to the Custom OSAs tab for many of our capabilities.