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Picosecond dual-wavelength fiber-based laser source for Guangzhou CCELAB

It took a lot of heart and sweat, but now it's done: WinWinTec International Group and TRUMPF Active Fiber Systems have won a bidding competition from a southern Chinese research group to develop a dual-wavelength picosecond fiber laser for Stimulated Raman Scattering (SRS) microscopy.

With the SRS laser, we address a tunability range from 1000 to 3300 cm-1 with a spectral bandwidth of <10cm-1 (output 1) and <15cm-1 (output 2), respectively. For our users, which are researchers from the Zhongshan School of Medicine, Sun-Yat-Sen University, and the Chemistry and Chemical Engineering Guangdong Laboratory, we will integrate it into a general-purpose SRS microscope to achieve rapid chemical mapping in biological materials and pharmaceuticals. Furthermore, the SRS laser will be used for developing SRS tags for medical diagnosis.

Our SRS lasers involve third-order nonlinear optical processes where three electromagnetic waves interact with the sample volume to generate a characteristic optical signal. Upon coincidence of the difference frequency of a pair of such waves corresponding to the frequency of a Raman resonance, the signal is greatly enhanced. These techniques are typically employed to image bio-molecules in living or fixed cells or tissues. They offer the great advantage to not require any sort of labeling or staining. Additionally, spectral information is obtained using broadband light sources. The signal-to-noise ratio of these applications benefits greatly from the application of pulsed lasers at high repetition rates.


Image of the SRS laser
© 2023 WinWinTec International Group


Spectral output of the wavelength 1 & 2
© 2017 Thomas Gottschall, PhD thesis




Fiber-based ps laser with large tuning range

and ultra-fast tuning speed

Despite the partial lockdown and logistical problems in Shanghai, we dare to do so: So please be brave, come and visit our booth at the "Laser World of Photonics China" from 13 to 15 July! We want to talk to you about the latest developments of our partner active fiber systems in compact, alignment-free and fiber-based picosecond laser sources for nonlinear (CARS and SRS) microscopy.

As an appetizer in advance, here you can see a range of what is technically possible:

Please contact us with your desired specifications and we happily customize a system exactly to your needs.




Nano characterization of scratches and defects on polished glass


The evaluation of many optical material surfaces requires nanometer resolution on relatively large and medium-sized surfaces. Is this also true for spectacle lenses?


Surface 3D characterization after friction experiments



BASALT-N2 set-up



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