Blue upconversion thulium laser
Upconversion has been an active area of research for at least two decades, mainly because of its wide ranging applications from infrared quantum counters, visible-emitting phosphors, to upconversion lasers. The upconversion lasers have recently become attractive with the advent of semiconductor laser diodes as the pump source. In an upconversion laser, the laser active ion is excited by internal upconversion of near-ir or red light via multiphoton excitation or cooperative processes and emits anti-Stokes visible light. Since the laser diode output wavelength can be composition turned to match the upconversion laser ion absorption lines, a substantial fraction of the ions can be driven into higher energy levels, thus enhancing the upconversion process. These upconversion solid-state lasers offer a potentially simple and compact source of visible coherent light with semiconductor laser diode excitation. We recently reported a novel upconversion thulium laser that emits blue light at 77 K. In this paper additional data on this 77 K upconversion laser as well as preliminary results on the room temperature upconversion laser are presented. In these demonstrations, dye lasers were used instead of diode lasers because they were more readily available than high power semiconductor laser diodes and their wavelengths could be adjusted easily. 14 refs., 5 figs., 1 tab.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- DOE/MA
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7006169
- Report Number(s):
- LA-UR-90-161; CONF-900162-2; ON: DE90006517
- Resource Relation:
- Journal Volume: 1223; Conference: Technical symposium on laser spectroscopy, Los Angeles, CA (USA), 14-19 Jan 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DYE LASERS
OPTICAL PUMPING
SEMICONDUCTOR LASERS
CRYSTALS
DAMAGING NEUTRON FLUENCE
DATA PROCESSING
DEMONSTRATION PROGRAMS
DESIGN
DOPED MATERIALS
EXPERIMENTAL DATA
FLUORESCENCE
FLUORINE
FREQUENCY ANALYSIS
LITHIUM
MEASURING METHODS
PERFORMANCE TESTING
PLANNING
POLARIZATION
POWER GENERATION
PULSE GENERATORS
RESEARCH PROGRAMS
TECHNOLOGY ASSESSMENT
TEMPERATURE EFFECTS
YTTRIUM
ALKALI METALS
DATA
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FUNCTION GENERATORS
HALOGENS
INFORMATION
LASERS
LIQUID LASERS
LUMINESCENCE
MATERIALS
METALS
NEUTRON FLUENCE
NONMETALS
NUMERICAL DATA
PROCESSING
PUMPING
SEMICONDUCTOR DEVICES
SOLID STATE LASERS
TESTING
TRANSITION ELEMENTS
426002* - Engineering- Lasers & Masers- (1990-)