Title: Demonstration of a kilowatt average power, 1 J, green laser

Abstract

A $\mathrm{\lambda \; <\#comment/>}=515\mathrm{n}\mathrm{m}$ laser generating joule-level pulses at 1 kHz repetition rate was demonstrated by frequency doubling 1.2 J, 2 ns temporally shaped square pulses from a cryogenically cooled Yb:YAG laser in an LBO crystal. A doubling efficiency of 78% resulted in 0.94 J second-harmonic pulses at 1 kHz. The unconverted light interacted with a second LBO crystal to generate $>\; <\#comment/>100\mathrm{m}\mathrm{J}$ second-harmonic pulses to reach a total green average power of 1.04 kW. A conversion efficiency of 89% was achieved for 0.58 J green pulses at 1 kHz. These results open the possibility to pump high energy femtosecond lasers at kilohertz repetition rates.

Authors:

Chi, Han  ^[1];

• Search DOE PAGES for author "Chi, Han"
• Search DOE PAGES for ORCID "0000-0002-8126-2672"

Wang, Yong ^[2]; Davenport, Aaron ^[1]; Menoni, Carmen S.  ^[2];

• Search DOE PAGES for author "Menoni, Carmen S."
• Search DOE PAGES for ORCID "0000-0001-9185-2572"

Rocca, Jorge J. ^[2]

---

+ Show Author Affiliations

1. Colorado State Univ., Fort Collins, CO (United States)
2. Colorado State Univ., Fort Collins, CO (United States); XUV Lasers, Inc., Fort Collins, CO (United States)

Publication Date:

Mon Dec 14 00:00:00 EST 2020

Research Org.:

XUV Lasers, Inc., Fort Collins, CO (United States)

Sponsoring Org.:

US Department of the Navy, Office of Naval Research (ONR); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

OSTI Identifier:

1853405

Alternate Identifier(s):

OSTI ID: 1735691

Grant/Contract Number:  

SC0019904; N00014-19-1-2254

Resource Type:

Accepted Manuscript

Journal Name:

Optics Letters

Additional Journal Information:

Journal Volume: 45; Journal Issue: 24; Journal ID: ISSN 0146-9592

Publisher:

Optical Society of America (OSA)

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; optics