N51-type Nd-doped phosphate laser glass is recently developed at Shanghai Institute of Optics and Fine Mechanics, China, especially for high-power laser applications. One multiphysics model is utilized to simulate the thermal recovery process of a single large-sized N51 amplifier, 810×460×40 mm3 slab with 12 mm thick edge cladding. The change of the average temperature with time, as well as the temperature at five points located at the center, long and short edge side, corner of the laser slab, and center of the edge cladding, are numerically simulated and discussed. On the thermal recovery, the slab equilibration time and the self-equilibration time are determined by the average temperature and the maximum temperature difference with a function of recovery time, respectively. For the whole slab, the temperature distribution, temperature gradient distribution, and thermal stress distribution during the thermal recovery process after a single but strong pumping are also numerically simulated by the transient-analysis method. Based on these numerical data of the N51 laser slab, it is suggested that N51 would be applied in high power laser systems with a better thermal recovery performance, as well as a higher stimulated emission cross section.
Absorption of edge-cladding Cu-glass for the strong amplified spontaneous emission of Nd-glass disk will produce
a large rise for the temperature and thermal stress near the cladding interface between Cu-glass and Nd-glass.
According to the calculation for amplified spontaneous emission of Nd-glass and thermal stress along the thickness
of Cu-glass, which is produced in our lab, the relations among temperature rise, thermal stress, CuO doping
concentration and thickness of cladding Cu-glass, are discussed in detail. If using 0.10% CuO doping instead of
1%, which was used in the previous time, the maximum temperature will decrease from 46K to 13K and the thermal
stress will decrease from 4.0 MPa to 0.8 MPa. Our edges cladding experimental results, obtained by the low CuO
concentration edge cladding glass, are consistent with the inferences and validated in the SG series laser systems.
In this paper, we report the optical and thermal properties of a new Nd-doped phosphate laser glass. Glass samples with
0.5-3.7 wt% Nd-doping concentrations were prepared, annealed, cut and polished for different measurements, including
glass density and refractive index, absorption spectra and emission cross section, as well as laser properties. A Mach-
Zehnder interferometer was used to measure the temperature coefficient of refractive index (dn/dT) and optical path
length (dS/dT) in the temperature range of 30-100 °C. Moreover, by increasing the glass temperature up to 500 °C, the
thermal expansion of this new glass was also measured. On the basis of these optical, thermal and thermo-optic
parameters, we calculated and analyzed some of glass parameters, such as the electronic polarizability of oxygen ions,
the optical basicity of this phosphate-based glass, and especially discussed their thermal shock resistance properties. It is
suggested that this new Nd-doped phosphate laser glass is an excellent candidate for high energy and high repetition rate
laser applications.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.