Design and test of an astigmatism compensated dynamical stable ring resonator for a subjoule class Nd:YAG laser without external elements

Davood Razzaghi; Mahmoud Rezanejad; Mahdi Shayganmanesh; Nasser Gohari

doi:10.1117/1.OE.58.2.026107

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9 February 2019 Design and test of an astigmatism compensated dynamical stable ring resonator for a subjoule class Nd:YAG laser without external elements

Davood Razzaghi, Mahmoud Rezanejad, Mahdi Shayganmanesh, Nasser Gohari

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Optical Engineering, 58(2), 026107 (2019). https://doi.org/10.1117/1.OE.58.2.026107

Abstract

An astigmatism compensated isosceles triangular ring resonator is designed and tested for a subjoule class Nd:YAG laser, considering the thermal lensing effects. The ABCD approach is used and the laser rod is considered as a lens like media whose optical power is induced by dissipated heat in the rod. The beam spot size, divergence angle, and some other parameters were studied for both sagittal and tangential planes and a minimal astigmatic configuration is designed applying dynamic stability condition. It is shown practically that the designed resonator emits a circular TEM₀₀ Gaussian beam (using an aperture). Comparative studies were also done considering a linear resonator especially for alignment sensitivity of the linear and ring resonator.

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Davood Razzaghi, Mahmoud Rezanejad, Mahdi Shayganmanesh, and Nasser Gohari "Design and test of an astigmatism compensated dynamical stable ring resonator for a subjoule class Nd:YAG laser without external elements," Optical Engineering 58(2), 026107 (9 February 2019). https://doi.org/10.1117/1.OE.58.2.026107

Received: 16 August 2018; Accepted: 22 January 2019; Published: 9 February 2019

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