Short wavelength extreme ultra-violet (EUV) lasers pumped by electron collisional excitation in plasmas irradiated by infra-red lasers have achieved saturated output down to wavelengths as short as 5.9 nm  and are now used for applications [2, 3]. These lasers operate without mirrors with output due to amplified spontaneous emission (ASE). The beam profiles consist typically of a large number of individual coherent beamlets  with a total near-field profile that is typically crescent shaped . Gain profiles are spectrally narrow dependent on thermal Doppler broadening of ions of temperature ∼ 100 - 200 eV. With gain narrowing, this result in pulses of spectral width v/δv < 104. The shortest pulse durations of the output EUV lasers have consequently been close to Fourier transform limited at ≈ 3 ps [6, 7].
|Title of host publication||2009 IEEE LEOS Annual Meeting Conference Proceedings, LEOS '09|
|Number of pages||2|
|Publication status||Published - 1 Dec 2009|
|Event||2009 IEEE LEOS Annual Meeting Conference, LEOS '09 - Belek-Antalya, Turkey|
Duration: 4 Oct 2009 → 8 Oct 2009
|Conference||2009 IEEE LEOS Annual Meeting Conference, LEOS '09|
|Period||4/10/09 → 8/10/09|