Selecting Materials for Radiation Balanced Lasers
نویسندگان
چکیده
Well-characterized solid-state laser materials are evaluated for performance in radiation balanced laser systems. New figures-of-merit are developed and applied to ytterbium doped materials. Superior performance is predicted for high cross section tungstate materials. Photothermal deflection experiments on samples of Yb doped KGd(WO4)2 confirm anti-Stokes fluorescence cooling. Observations of optical cooling in this high figure-of-merit material confirm the potential of this approach for laser power scaling. OCIS Codes: (140.3580) Lasers, solid-state, (140.3380) Laser materials, (140.3320) Laser cooling
منابع مشابه
Thermodynamics of radiation-balanced lasing
Athermal lasers dispose of their waste heat in the form of spontaneous fluorescence (i.e., by laser cooling) to avoid warming the medium. The thermodynamics of this process is discussed both qualitatively and quantitatively from the point of view of the first and second laws. The steady-state optical dynamics of an ytterbium-doped KGd(WO4)2 fiber is analyzed as a model radiation-balanced solid-...
متن کاملAttosecond active synchronization of passively mode-locked lasers by balanced cross correlation.
A balanced cross correlator, the optical equivalent of a balanced microwave phase detector, is demonstrated. Its use in synchronizing an octave-spanning Ti:sapphire laser and a 30-fs Cr:forsterite laser yields 300-attosecond timing jitter measured from 10 mHz to 2.3 MHz. The spectral overlap between the two lasers is strong enough to permit direct detection of the difference in carrier-envelope...
متن کاملNew materials for optical cooling
Well-characterized solid-state laser materials are evaluated for performance in optical refrigeration as well as radiation-balanced laser systems. New figures-of-merit are developed and applied to ytterbium-doped materials. Superior performance is predicted for high-cross-section tungstate materials. Photothermal deflection experiments on samples of Yb3+-doped KGd(WO4)2 confirm anti-Stokes fluo...
متن کاملPhase locking of 2.324 and 2.959 terahertz quantum cascade lasers using a Schottky diode harmonic mixer.
The 23rd and 31st harmonics of a microwave signal generated in a novel THz balanced Schottky diode mixer were used as a frequency stable reference source to phase lock solid-nitrogen-cooled 2.324 and 2.959 THz quantum cascade lasers. Hertz-level frequency stability was achieved, which was maintained for several hours.
متن کاملFree-electron lasers. Status and applications.
A free-electron laser consists of an electron beam propagating through a periodic magnetic field. Today such lasers are used for research in materials science, chemical technology, biophysical science, medical applications, surface studies, and solid-state physics. Free-electron lasers with higher average power and shorter wavelengths are under development. Future applications range from indust...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000