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M.E. Innocenzi

Bio: M.E. Innocenzi is an academic researcher from The Aerospace Corporation. The author has contributed to research in topics: Heat equation & Solid-state laser. The author has an hindex of 2, co-authored 2 publications receiving 528 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the heat equation for an axially heated cylinder with a thermally conductive boundary at the periphery has been solved using both a full numerical solution and an analytic approximation which assumes only radial heat flow.
Abstract: In order to estimate deleterious effects caused by heating in continuous‐wave end‐pumped solid‐state lasers, the heat equation has been solved for an axially heated cylinder with a thermally conductive boundary at the periphery Steady‐state thermal profiles are developed using both a full numerical solution and an analytic approximation which assumes only radial heat flow The analytic solution, which is in good agreement with the numerical solution, is utilized to obtain an expression for the thermal focusing due to temperature‐induced refractive index changes For Nd:YAG, 1 W of pump power deposited as heat is predicted to cause a thermal focusing length comparable to the cavity length of a typical diode end‐pumped laser

536 citations

Proceedings ArticleDOI
01 May 1989

18 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors present a comprehensive study of thermal, stress, and average power scaling in double-clad silica fiber lasers, and show that careful management of thermal effects in fiber lasers will determine the efficiency and success of scaling-up efforts.
Abstract: Yb:glass fiber lasers have matured to the point where the average power scaling of such devices to the kilowatt level and beyond can be realistically pursued. In this paper, we present a comprehensive study of thermal, stress, and average power scaling in double-clad silica fiber lasers. We show that careful management of thermal effects in fiber lasers will determine the efficiency and success of scaling-up efforts.

387 citations

Journal ArticleDOI
TL;DR: In this article, the theory of stimulated Raman scattering is presented in the context of understanding the design and operation of solid-state Raman lasers, and the key design issues are discussed in relation to achieving efficient frequency conversion for various types of experimental configurations.

381 citations

Journal ArticleDOI
TL;DR: A review of theoretical and experimental studies of thermal effects in solid-state lasers is presented, with a special focus on diode-pumped ytterbium-doped materials as mentioned in this paper.

339 citations

Journal ArticleDOI
TL;DR: In this paper, the authors derived the relevant optical distortion profiles and maximum stresses as a function of length-to-diameter ratio and pump spot size in end-pumped solid-state laser rods.
Abstract: Thermal effects lead to upper limits on the maximum achievable power in end-pumped solid-state laser rods. Thermal fracture is an ultimate limitation on pump power, while optical distortions and depolarization leading to increased losses in the laser resonator tend to yield a lower upper bound on the pump power. The relevant optical distortion profiles and maximum stresses are derived as a function of length-to-diameter ratio and pump spot size. Length-to-diameter ratios up to 1.5 are considered. Edge-cooled and face-cooled active-mirror geometries are analyzed and compared directly. The problem is cast into a nondimensional form so that the results are applicable to arbitrary rod materials. >

283 citations

Journal ArticleDOI
TL;DR: In this article, the scaling limits of diode-end-pumped Nd:YAG laser are analyzed by pumping geometry, thermal distortion, birefringence, and fracture.
Abstract: The authors analyze the scaling limits of diode-end-pumped Nd:YAG lasers imposed by pumping geometry, thermal distortion, birefringence, and fracture. A scalable 15-W output power diode-end-pumped laser which achieves a 60% slope efficiency is demonstrated. Thermal distortion in this laser is reduced from 2.6 waves to less than 0.15 waves with an aspheric laser rod. Depolarization is reduced by 40 times to less than 0.2% per pass using optical rotators. Modeling results, which accurately predict thermal distortion and birefringence, imply a thermal fracture-limited output power for short end-pumped rods less than 45 W. A dual rod design for an 80-W device is described. One of the four modules in this device has been assembled and tested, producing a CW output of 22.5 W. >

280 citations