Title :
Enhanced laser cooling of Tm-doped solids by upconversion pumping
Author :
Jing Dai ; Li Li ; Xinlu Zhang
Author_Institution :
Key Lab. of In-Fiber Integrated Opt. of Minist. of Educ., Harbin Eng. Univ., Harbin, China
Abstract :
We present a physical scheme of upconversion-assisted anti-Stokes fluorescence cooling in Tm doped low phonon materials. The upconversion pumping from the metastable level to the upconversion excited level is introduced to produce extra anti-Stokes cooling cycles which can improve the laser cooling performance. Both the limitation of the cooling cryogenic temperature and the range of the cooling wavelength can be extended notably in contrast to the traditional anti-Stokes cooling.
Keywords :
cryogenics; fluorescence; laser cooling; metastable states; optical pumping; phonons; thulium; Tm doped low phonon materials; Tm-doped solids; cooling wavelength; cryogenic temperature; laser cooling; metastable level; upconversion excited level; upconversion pumping; upconversion-assisted antiStokes fluorescence cooling; Cooling; Fluorescence; Laser excitation; Laser theory; Pump lasers; Solid lasers; Solids; anti-Stokes fluorescence; laser cooling; rare earth solid;
Conference_Titel :
Optoelectronics and Microelectronics (ICOM), 2013 International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4799-1214-8
DOI :
10.1109/ICoOM.2013.6626530
