Broadband Tunable Lasers: Combining Supercontinuum Lasers with Tunable Filters

Types of Tunable Filters

The selection of a tunable filter for a supercontinuum laser depends on the application requirements, and is based on desired tunable range, the number of desired output wavelengths, as well as on the resolution of the output. These are some of the most common types of tunable filters used with supercontinuum white light lasers:

  • Variable bandwidth tunable filters. Usually with a single-wavelength output, these budget-friendly filters use a combination of linear variable filters to achieve tunability mostly in the visible range, from 350 nm to 850 nm, and allow bandwidth tunability from 10 nm to 100 nm.
  • Acousto-Optic Tunable Filters (AOTFs). These filters use acoustic waves induced by RF signals to change the refractive index of a crystal, allowing for tunable wavelength selection.  They offer a wide tunable range and the possibility of multiple tunable output wavelengths simultaneously. 
  • Grating-based filters. These include devices such as diffraction or other gratings that can be used as tunable filters. They have a wide tunability range and have a narrow linewidth single output.

Modular and Flexible: Leukos’ Compact Broadband Tunable Laser

broadband tunable laser
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