- Fluorescence Microscopy
- Coherence Tomography
- Flow Cytometry
- Optical Device Characterization
- Coherent Anti-Stokes Raman Scattering
Thorlabs' Supercontinuum Generation Kits use femtoWHITE highly nonlinear fibers to spectrally broaden femtosecond pulses near 800 nm. The SCKB(/M) produces an output beam that combines the high power and spatial coherence of a laser with the broad spectrum of an incandescent source. The SCKB-CARS(/M) provides a stable beam with peaks at two separate center wavelengths.
When pumped with a femtosecond Ti:Sapphire Laser, the SCKB(/M) produces smooth, stable output providing even intensity across the 400 - 1600 nm spectral range, as shown in the plots on the Graphs Tab. The shape and intensity of the supercontinuum is determined by the pump wavelength, peak power, and pulse length. Information on possible lasers that are compatible with the SCKB is provided on the Kit Customization tab.
Depending on the relative distance from the zero dispersion wavelength of the fiber, a variety of nonlinear effects are responsible for the creation of the spectrum; these effects include self-phase modulation, Raman scattering, soliton fission, and four-wave mixing. Please refer to J.M. Dudley, G. Genty, S. Coen. "Supercontinuum generation in photonic crystal fiber" Rev. Mod. Phys. 78, 1135 (2006) for a review of these effects in photonic crystal fibers.
The supercontinuum generation kits provide a set of of preselected and proven parts which allows the user to quickly set up the parts and start creating a supercontinuum spectrum. Due to this modular nature, the supercontinuum kits may be easily customized to a particular application by replacing components. For an example, please see the Kit Customization Tab above. The kits are shipped unassembled; however, pre-assembly is available for an additional fee. For details, please contact Technical Support.
Coherent Anti-Stokes Raman Scattering (CARS) Version
The SCKB-CARS(/M) contains a fiber with two zero-dispersion wavelengths for generation of an output with two distinct peaks, suitable for Coherent Anti-Stokes Raman Scattering applications. When pumped at a wavelength between the two zero-dispersion wavelengths, more than 99% of the light is converted into two spectral peaks.
The peak wavelengths are a result of the two zero-dispersion wavelengths that are determined solely by the design of the nonlinear PCF fiber. Due to this, the output wavelength is insensitive to changes in pump wavelength, pulse energy, pulse width, and spectral bandwidth. However, the relative intensity of the two peaks can be adjusted by varying of the pump wavelength.
For more information, please see K. M. Hilligsøe, T. V. Andersen, H. N. Paulsen, C. K. Nielsen, K. Mølmer, S. Keiding, R. E. Kristiansen, K. P. Hansen, and J. J. Larsen, "Supercontinuum generation a photonic crystal fiber with two zero dispersion wavelengths" Opt. Express 12, 1045 (2004).