C-wave technology

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C-wave technology

The tunable laser light source

“Two in one” – for a clearly visible result

Optical parametric oscillators (OPO) produce widely tunable emission from powerful, fixed-frequency sources. However, the new light has always wavelengths larger than the one emitted by the pump laser. For the generation of continuous-wave light this poses a severe challenge: How to cover the whole visible range from a green cw pump laser?

Spectral coverage  comparison chart

The concept of C-WAVE allows to build laser-light sources for tunable continuous-wave emission from the near UV into the infrared. The bright windows in the spectral coverage chart indicate the full standard tuning range of C-WAVE. Other wavelength ranges are available upon request.
Note that there are two gaps in the tuning range: 522 – 542 nm in the visible part of the spectrum and at 1044 – 1084 nm in the infrared. Wavelenghts within those windows can be reached, however the specifications are not guaranteed for this range. If you plan to perform your experiments at wavelengths within those gaps, just contact us.

The C-WAVE combines two nonlinear processes: In the first step (OPO), a 532-nm laser pumps a periodically-poled nonlinear crystal. Signal and idler waves with tunable frequencies in the near-infrared are generated, controlled by the crystal’s poling period and temperature. In the second step (SHG), these waves pass through a frequency doubling crystal: Second harmonic generation of the signal wave leads to colors from blue to green, while the idler wave is converted into colors from green to red.

Easy tuning

No components need to be changed in order to cover the visible spectrum. The desired wavelength can be simply set at the computer and the C-WAVE adjusts itself automatically. Careful design of the cavity and mounting in a compact and robust frame guarantee a high beam quality and output stability across the whole tuning range.
The C-WAVE: Continuous-wave light throughout the visible spectral range. Without the use of toxic chemicals – finally all-solid-state.


Measured beam profile and intensity cross sections.

Two-step light conversion into the visible spectrum.

Frequency conversion scheme of the C-WAVE.

Measured beam profile and intensity cross sections.

Two-step light conversion into the visible spectrum.

Configure your c-wave

Of course, it is possible to configure your own c-wave unit with different wavelength, linewidth and power options. Select between three wavelength options. You can also combine two or more options in one unit.

* gap at 1044-1084 nm