Laser-Induced Fluorescence (LIF) Reference Cell With Iodine (I2) For Laser Wavelength Calibration

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Hammamatsu R955 PMT (160-900 nm) Included These Laser-Induced Fluorescence (LIF) system contain a photomultiplier tube (PMT) and base, cut-off filter compartment, and vacuum sealed iodine cell. The wavelength of a tunable commercial laser, such as, a continuous wave (cw) diode or pulsed dye laser, are often off be some small amount and typically do not scan linear in energy. A common practice is to simultaneously record a reference spectrum of an atom or molecule with well-known transitions energies. This allows the collected spectral data to be accurately calibrated. This system allows for the collection of the LIF spectrum of iodine which can be used as a reference spectrum. The absorption spectrum of iodine (often recorded with cw lasers) is typically accomplished by placing a photodiode at the output side of the reference cell. The LIF technique is more applicable to pulsed lasers with high peak power, such as, dye and optical parametric oscillator (OPO) laser systems.