Speaker
Description
An Infrared Free Electron Laser (IR-FEL) has been built at RRCAT, Indore to serve as a user facility for the optical spectroscopy of materials in low temperature and high magnetic field environment. The first commissioning experiments on the IR-FEL setup were performed in 2016 with an injector system built in-house. The first observation of lasing using this setup was made in November 2016, but the achieved out-coupled power was two to three orders of magnitude lower as compared to the saturated out-coupled power predicted by the FEL design simulations. The setup has recently undergone a major upgrade with the installation and commissioning of a new injector system, and saturation of lasing at a wavelength of 28 m has been observed in March 2020, which is the first lasing of a FEL in India. The maximum measured Continuous Wave (CW) out-coupled power is 7.3 mW, which is in a reasonably good agreement with predictions of the FEL simulations considering the experimental electron beam parameters. Efforts are presently underway to achieve out-coupled CW average power greater than 125 mW by increasing the duty cycle of the injector system.
