Depolarization degree of picosecond radially polarized beam induced by non-radially symmetrical pumping during power amplification

Ce Yang; Hongpan Peng; Meng Chen

doi:10.1117/12.2506214

15 November 2018 Depolarization degree of picosecond radially polarized beam induced by non-radially symmetrical pumping during power amplification

Ce Yang, Hongpan Peng, Meng Chen

Author Affiliations +

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109644T (2018) https://doi.org/10.1117/12.2506214
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

The effect of the gain medium planar shear stress, induced by non-radially symmetrical pumping during power amplification process, on the depolarization of radially polarized beam was analyzed in detail. For radially polarized beam, theoretical simulation had showed that the non-radial distribution of planar shear stress led to the different depolarization in different polarization directions, that the depolarization of the direction of 45° and 135° is five times more serious than that of 0° and 90°. In the following experiment, the radially polarized seed beam with a repetition rate of 1 kHz, an average power of 5 W and a pulse width of 100 ps was single-propagating double-rod Nd:YAG laser amplifier. Each rod was surrounded by three diode-pumped arrays with an angle of 120°. During the amplification process, the depolarization degree of radially polarized beam was 6.73%, which was obtained by measuring the difference between the power of the two beams transmitted and reflected by the analyzer TFP. The power of amplified radially polarized beam was 15.17 W with the purity of 89.3% and M² of 3.95.

Citation Download Citation

Ce Yang, Hongpan Peng, and Meng Chen "Depolarization degree of picosecond radially polarized beam induced by non-radially symmetrical pumping during power amplification", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109644T (15 November 2018); https://doi.org/10.1117/12.2506214

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

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.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
4 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Amplifiers

Polarization

Picosecond phenomena

Rod lasers

Finite element methods

Nd:YAG lasers

Optical simulations

Show All Keywords

Keywords/Phrases

Search In:

Publication Years