The first stage of Novosibirsk high power free electron laser (FEL) was commissioned in 2003. It is based on the normal conducting CW energy recovery linac. Now the FEL provides electromagnetic radiation in the wavelength range 120 -180 micron. The average power is 200 W. The minimum measured linewidth is 0.3%, which is close to the Fourier-transform limit. The assembly of user beamline is in progress. Plans of future developments are discussed.

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A 100-MeV 8-turns accelerator-recuperator (AR) intended to drive a high-power infrared free electron laser (FEL) is under construction in Novosibirsk now. The FEL will provide up to 100 kW average power radiation in the wavelength range 2 -50 µm. As building up the full-scale machine takes a long time and much resources, it is reasonably to divide the project into two stages.The first-stage machine includes the AR with the fullscale RF-system and only one turn of electron beam, so the maximum energy of electrons is 14 MeV. A submillimeter-wave FEL will be installed on the single backward track of the AR. The expected FEL parameters are: wavelength of emitted radiation 100...200 µm; pulse duration 20...100 ps; peak power 1...7 MW; average power 0.6...7 kW. Thus, one gets an operating FEL after commissioning the first stage of the project. Some aspects of these two projects and possible applications are discussed.