LED-pumped eye-safe pulse laser with an extracavity optical parametric oscillator

C. H. Chang, K. T. Yen, A. L. Li, Y. R. Li, K. W. Su*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

An LED-side-pumped Nd:YAG/Cr4+:YAG passively Qswitched (PQS) laser containing an extracavity optical parametric oscillator (EOPO) is demonstrated. As far as we know, it is the first LED-pumped eye-safe laser. The Nd:YAG pump module is optimized to increase the PQS pulse energy to 24 mJ at 1064 nm. By using a single-pass EOPO design, the output energy of the signal pulse at 1573nm is 7.44 mJ with a pulse width of 16 ns, the peak power is 434 kW, and the pump-to-signal conversion efficiency is 31%. For double-pass EOPO operation, the pump-to-signal conversion efficiency increases to 45.8%, the output energy of signal pulse is up to 10.98 mJ with a pulse width of 23.5 ns, and the peak power is 459 kW.

Original languageEnglish
Pages (from-to)3877-3880
Number of pages4
JournalOptics Letters
Volume48
Issue number15
DOIs
StatePublished - 1 Aug 2023

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