Monolithic Rare Earth Doped PTR Glass Laser

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$599,999.00
Award Year:
2011
Program:
SBIR
Phase:
Phase II
Contract:
NNX11CA87C
Agency Tracking Number:
095616
Solicitation Year:
2009
Solicitation Topic Code:
S1.01
Solicitation Number:
n/a
Small Business Information
OptiGrate Corporation
FL, Orlando, FL, 32826-3230
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
120669085
Principal Investigator:
Vadim Smirnov
Principal Investigator
(407) 381-4115
vsmirnov@optigrate.com
Business Contact:
Igor Ciapurin
Business Official
(407) 381-4115
iciapurin@optigrate.com
Research Institution:
Stub




Abstract
The main goal of the project is to demonstrate the feasibility of a monolithic solid state laser on the basis of PTR glass co-doped with luminescent rare earth ions. The main feature of this new complex material is its ability to be simultaneously an active laser medium and a phase photosensitive medium. That way the same piece of material can be used as laser gain element and a monolithic laser resonator produced by the recorded in that volume Bragg gratings (VBGs). A series of PTR glasses co-doped with rare-earth ions (Nd, Yb and Er) was fabricated. It was shown that those glasses possess both high efficiency of luminescence and photosensitivity (photo-thermo-induced change of refractive index). A technology of the recording of volume Bragg gratings in each of these new PTR glasses was developed and controllable diffraction efficiency between 10 and 99% was demonstrated. A laser was demonstrated in Nd-doped PTR glass plate using an external Fabry-Perot resonator based on two plane dielectric mirrors with longitudinal pumping by laser diodes at 808 nm. Lasing and narrowing of spectrum down to ~20 pm is demonstrated when one of the mirrors was replaced by a high efficiency VBG.

* information listed above is at the time of submission.

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