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@ARTICLE{Kilinc:602688,
      author       = {Kilinc, Muharrem and Demirbas, Uemit and Thesinga, Jelto
                      and Kellert, Martin and Kärtner, Franz and Pergament,
                      Mikhail},
      title        = {{F}ractional thermal load in cryogenically cooled
                      {Y}b:{YLF} and {Y}b:{YAG} lasers},
      journal      = {Optical materials express},
      volume       = {14},
      number       = {6},
      issn         = {2159-3930},
      address      = {Washington, DC},
      publisher    = {Optica},
      reportid     = {PUBDB-2024-00734},
      pages        = {1499},
      year         = {2024},
      abstract     = {We present a method for the direct measurement of
                      fractional thermal load (FTL) in cryogenically cooled laser
                      crystals. The experimental methodology involves
                      characterizing the liquid nitrogen evaporation rate in a
                      dewar containing the laser crystals, allowing for the
                      accurate determination of FTL. The FTL is measured to be 1.7
                      × quantum defect (QD) for Yb:YLF and 1.5 × QD for Yb:YAG
                      under continuous wave lasing conditions. The measured FTL
                      values are then used to calculate the temperature
                      distribution inside the crystals as a function of pump
                      power, and the simulation results are found to be in very
                      good agreement with the in-situ temperature measurements
                      using contactless optical luminescence thermometry. The
                      method and findings presented in this work hold great
                      potential to benefit laser engineers and scientists working
                      with cryogenic lasers to address and overcome
                      temperature-dependent handicaps.},
      cin          = {FS-CFEL-2},
      ddc          = {620},
      cid          = {I:(DE-H253)FS-CFEL-2-20120731},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / AXSIS - Frontiers in Attosecond X-ray Science:
                      Imaging and Spectroscopy (609920) / DFG project 405983224 -
                      Erzeugung von Sub-Picosekunden Elektronenpaketen durch
                      starke THz-Felder für Hochfeld- Elektronenbeschleunigung
                      und ultraschnelle Elektronen-beugende Bildgebung
                      (405983224)},
      pid          = {G:(DE-HGF)POF4-631 / G:(EU-Grant)609920 /
                      G:(GEPRIS)405983224},
      experiment   = {EXP:(DE-H253)AXSIS-20200101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001248778900002},
      doi          = {10.1364/OME.521506},
      url          = {https://bib-pubdb1.desy.de/record/602688},
}