HighFinesse Linewidth Analyzer

Versatile Instruments for Measuring, Analyzing and Controlling the Frequency Noise and Lineshape of Narrow Laser Sources

  • Measurement of frequency deviation time trace
  • Frequency noise density spectrum
  • Intensity noise spectrum
  • Laser lineshape spectrum

The HighFinesse Linewidth Analyzers (LWAs) are very versatile, robust and compact instruments for measuring, analyzing and controlling frequency and intensity noise of lasers. This makes them ideal equipment for exact laser characterization in real time.

The superb sensitivity is achieved by combining an interferometric working principle with high-end optical and electronic components. Based on the measurement of frequency deviations over time calculations are possible of the frequency noise density spectrum, the optical lineshape with evaluation of intrinsic (Lorentzian) linewidth down to 350 Hz and effective (optical) linewidth, and the relative intensity noise (RIN). By further analysis many additional quantities are accessible. The unbiased measurement principle of the LWA is superior to optical delay line techniques, because the latter rely on non-trivial evaluation needs due to the technique inherent loss of information. The LWA also allows for linewidth reduction of lasers using PID control.
The LWA-1k product series offers instruments for the measurement down to very low linewidths. The LWA-100k products series enables accurate linewidth measurements over a very large wavelength range

  • Specification

    LWA-1k Series
    • frequency noise density:   50 Hz – 10 MHz
    • optical & Lorentzian linewidth:   350 Hz – 20 MHz
    • narrowing linewidth PID control
    • based on frequency discriminator (interferometer)
      Wavelength range [nm] Noise floor [Hz/√Hz] Frequency Noise Bandwidth Intrinsic linewidth range Effective linewidth range
    LWA-1k 780 760 - 1064 25 - 500 10 Hz - 10 MHz < 8 kHz < 10 kHz - 20 MHz
    LWA-1k 1550 1530 - 1565 5 - 100 10 Hz - 10 MHz < 350 Hz < 1 kHz - 20 MHz

     

    LWA-100k Series
    • frequency noise density:   25 Hz – 10 MHz
    • optical & Lorentzian linewidth:   2 kHz – 20 MHz
    • narrowing linewidth PID control
    • based on frequency discriminator (interferometer)• based on frequency discriminator (interferometer)
      Wavelength range [nm] Noise floor [Hz/√Hz] Frequency Noise Bandwidth Intrinsic linewidth range Effective linewidth range
    LWA-100k NIR 1064 - 1625 25 - 1000 25 Hz - 10 MHz < 2 kHz < 10 kHz - 20 MHz
    LWA-100k VIS          
  • Applications

    • Laser manufacturing
    • Laser characterization
    • Optical telecommunications
    • Linewidth reduction
    • Quantum technologies

  • Downloads

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