Passively Q Switched Dual Channel Tm:Ylf Laser By Intracavity Spectral Beam Combination With Volume Bragg Gratings

Abstract

A novel dual channel Tm:YLF laser system was developed where two degenerate laser cavities were coupled by spectrally beam combining their emission and by implementing a common output coupler. Under continuous wave running conditions, each channel’s slope efficiency was greater than 45% and the maximum combined output power was 11 W. Passive Q-switching was achieved using an 80%, Cr:ZnSe saturable absorber. The output pulses had a maximum energy of 5.8 mJ and duration of 90 ns (~65 kW of peak power) at 5.7 W of absorbed pump power. Each channel showed less than 1 nm of spectral width with central wavelengths around 1880 nm and 1908 nm correspondingly. The system had adjustable spectral difference between the channels ranging from 5 to 20 nm which corresponds to 0.4 – 1.7 THz if the system is used for nonlinear difference frequency generation.

Publication Date

6-25-2018

Publication Title

Optics Express

Volume

26

Issue

13

Number of Pages

16670-16678

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OE.26.016670

Socpus ID

85048949882 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85048949882

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