Newport’s Coherent anti-Stokes Raman Scattering Microspectrometer solution is designed to integrate with Ti:Sapphire femtosecond oscillators to perform CARS Microspectroscopy related experiments. In this solution a Phonic crystal fiber is used to generate broadband Supercontinnum that can be used as a Stokes pulse. This complete solution from Newport also includes detailed information on set up, alignment and components uses to help researchers save valuable time and resources.
Details on Supercontinnum generation can also be found in another TAC solution for Supercontinnum generation (see Supercontinuum Generation in SCG-800 Photonic Crystal Fiber). This kit is based on off the shelf Newport products for easy set up, and can also be used in various Spectroscopy and Imaging applications.
Click on any image below to enlarge.
Figure 1. Energy diagram of the CARS process. The CARS signal is resonantly enhanced when the difference between the pump ωρ and Stokes ωS frequencies matches a vibrational transition ΩΡ of the molecule.
Figure 2. The combination of spectrally narrow picosecond pulse as a pump ωρ and probe ωρ’ and a broadband femtosecond pulse as Stokes is the basis for broadband CARS.
Figure 3. Block Diagram of Experimental Setup: FI-Faraday isolator, 1/2 WP – half wave plate, BS – beam splitter, RELP – razor edge long pass filter, LP – long pass filter, SCG-800 – supercontinuum generation kit, FO – focusing objective, CO – collimating objective, SP – combination of short pass filters, FM – flip mount, PMT – photomultiplier.
