Versatile Application, Detailed Analysis and Live Monitoring

Characterization of frequency and phase noise of laser light sources has never been easier: The High Finesse LWA-100k enables the user to characterize and optimize laser light sources with high precision over a broad wavelength range including the O-/E-/S-/C- and L-band for telecommunication sources and typical wavelengths for quantum optical applications in the IR range.

Supplying your laser light via a single-mode fiber (arbitrary light polarisation can be used) the LWA-100k supplies a real-time analogue voltage output proportional to the frequency deviations of the laser. The detection technique is based on a interferometric measurement principle and therefore there is no additional need for a highly stable narrow optical light reference.

The output can either be analyzed with the supplied Digitizer module and the software suite for quantitative analysis of the noise or in order to feedback the voltage signal to your own systems.

This Design Directly Opens up a Variety of Versatile Applications

  • Measurement of the intrinsic (Lorentzian) and effective (optical) linewidth of your laser source
  • Frequency resolved laser noise analysis by means of frequency noise density spectra
  • Laser control unit characterization (supply noise, ground loop problems)
  • Identification of acoustical noise sources
  • Laser modulation characterization (e.g. frequency dependent amplitude transfer function)
  • Feedback loop characterization (Bandwidth, Servo bumps, frequency drifts)
  • Linewidth reduction/Coherence control (PID controller required, not included)

In general, laser frequency noise can either be analyzed via the frequency noise density spectrum or the optical lineshape spectrum which contains much more information than the condensed number of the laser linewidth or the coherence time.

From the spectra, individual frequency components and special linewidth shapes (e.g. due to large index modulations) are directly visible and bring insight to the relevant linewidth parameters. The software suite incorporates both spectral representations and condensed linewidth numbers that can be directly derived from the time-resolved frequency deviations.

  • Determination of frequency modulation amplitudes in the time-resolved frequency deviations (Timeseries)
  • Optical Linewidth estimation by beta-separation method
  • Intrinsic Linewidth measurement via the frequency noise density floor
  • Effective (Gaussian part) and intrinsic (Lorentzian part) linewidth analysis by fit to the optical spectrum
  • Detection of bistabilities and random telegraph noise in the lasing frequency by histogram of frequency deviations
  • Export possibilities for extended analysis with the software of choice

Live Monitoring

Due to the performance optimized software suite, it is possible to display the spectral information with a high repetition rate enabling realtime-operation. Therefore, the above applications can be exploited to do …

  • Time and state dependent analysis of the laser's linewidths
  • Optimizations and mechanical/electronic adjustments on your laboratory setup to the spectral signal and the linewidth
  • Health monitoring of your laser source

Available measurement range: 1064nm - 1625nm (standard)

Custom wavelength ranges also available. Please contact to discuss. 

Further information:

Product Brochure

Technical Data