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Title: Understanding fifth-harmonic generation in CLBO

Abstract

Here, we report on results of fifth harmonic generation in Cesium Lithium Borate (CLBO) using a three-crystal cascaded frequency conversion scheme designed to study the energy balance of the final sum frequency generation stage. The experimental setup independently combines the first and fourth harmonic of a Nd:Glass laser in a 5mm thick CLBO crystal. Energy balance between the incoming and output energy is close to unity when the CLBO is out of phase matching and approximately 80% when the crystal is in phase matching. A detailed analysis of the residual fundamental and fourth harmonic energy indicates 5th harmonic light is being generated but only 26% is unaccounted for. We attribute the missing light to linear transmission loss in the CLBO oven. The ratio of the output to input energy is unity when the missing 5th harmonic is incorporated into the calculations. Two-dimensional plane wave mixing simulations show agreement with the results at lower intensities.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1488777
Report Number(s):
LLNL-JRNL-744411
Journal ID: ISSN 0277-786X; 899348
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of SPIE - The International Society for Optical Engineering
Additional Journal Information:
Journal Volume: 10516; Journal Issue: none; Conference: SPIE LASE, 2018, San Francisco, CA (United States); Journal ID: ISSN 0277-786X
Publisher:
SPIE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Deep-UV generation; Ultraviolet Lasers; Nonlinear Optics; Nonlinear Crystals; Two Photon Absorption

Citation Formats

Patankar, Siddharth, Yang, Steven T., Ross, Steven J., Moody, John D., Swadling, George F., Bayramian, Andy, Barker, David, Datte, Philip S., Bromage, Jake, Begishev, Ildar A., Norton, Mary, Carr, Christopher W., and Mennerat, Gabriel. Understanding fifth-harmonic generation in CLBO. United States: N. p., 2018. Web. doi:10.1117/12.2288496.
Patankar, Siddharth, Yang, Steven T., Ross, Steven J., Moody, John D., Swadling, George F., Bayramian, Andy, Barker, David, Datte, Philip S., Bromage, Jake, Begishev, Ildar A., Norton, Mary, Carr, Christopher W., & Mennerat, Gabriel. Understanding fifth-harmonic generation in CLBO. United States. doi:10.1117/12.2288496.
Patankar, Siddharth, Yang, Steven T., Ross, Steven J., Moody, John D., Swadling, George F., Bayramian, Andy, Barker, David, Datte, Philip S., Bromage, Jake, Begishev, Ildar A., Norton, Mary, Carr, Christopher W., and Mennerat, Gabriel. Thu . "Understanding fifth-harmonic generation in CLBO". United States. doi:10.1117/12.2288496. https://www.osti.gov/servlets/purl/1488777.
@article{osti_1488777,
title = {Understanding fifth-harmonic generation in CLBO},
author = {Patankar, Siddharth and Yang, Steven T. and Ross, Steven J. and Moody, John D. and Swadling, George F. and Bayramian, Andy and Barker, David and Datte, Philip S. and Bromage, Jake and Begishev, Ildar A. and Norton, Mary and Carr, Christopher W. and Mennerat, Gabriel},
abstractNote = {Here, we report on results of fifth harmonic generation in Cesium Lithium Borate (CLBO) using a three-crystal cascaded frequency conversion scheme designed to study the energy balance of the final sum frequency generation stage. The experimental setup independently combines the first and fourth harmonic of a Nd:Glass laser in a 5mm thick CLBO crystal. Energy balance between the incoming and output energy is close to unity when the CLBO is out of phase matching and approximately 80% when the crystal is in phase matching. A detailed analysis of the residual fundamental and fourth harmonic energy indicates 5th harmonic light is being generated but only 26% is unaccounted for. We attribute the missing light to linear transmission loss in the CLBO oven. The ratio of the output to input energy is unity when the missing 5th harmonic is incorporated into the calculations. Two-dimensional plane wave mixing simulations show agreement with the results at lower intensities.},
doi = {10.1117/12.2288496},
journal = {Proceedings of SPIE - The International Society for Optical Engineering},
number = none,
volume = 10516,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Diagram of the experimental setup for the fifth harmonic generation experiment. A waveplate (WP1) is used to adjust the energy balance between the 1ω and 4ω sections. A second waveplate (WP2) offers independent control of 1ω energy without affecting 4ω energy. A type I 18mm KDP doubler (SHG)more » was used to generate the second harmonic. Fourth harmonic was generated using a 6mm type I KDP (4HG) crystal. The residual colors from the fourth harmonic generation process are removed using an array of 4ω high reflectors. Input energy is measured in both sections before the generated 4ω is mixed with the 1ω in a type I 5mm CLBO crystal to make fifth harmonic.« less

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Works referenced in this record:

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.