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hvphotonicsCommunicationAn Electro-Optic, Actively Q-Switched Tm:YAP/KGW External-Cavity Raman Laser at 2273 nm and 2344 nmRotem Nahear, Neria Suliman, Yechiel Bach and Salman Noach Department of Applied Physics, Electro-Optics Engineering Faculty, Jerusalem College of Technologies, Jerusalem 9372115, Israel; [email protected] (R.N.); [email protected] (N.S.); [email protected] (Y.B.) Correspondence: [email protected]: This paper presents a KGW Raman laser with an external-cavity configuration within the 2 area. The Raman laser is pumped by exclusive, electro-optic, actively Q-switched Tm:Yap laser, emitting at 1935 nm. The electro-optic modulation is primarily based on a KLTN crystal, enabling the usage of a brief crystal length, with a reasonably low driving voltage. As a result of KGW bi-axial properties, the Raman laser is capable to lase YC-001 Epigenetic Reader Domain separately at two different output wavelengths, 2273 and 2344 nm. The output energies and pulse durations for these two lines are 0.42 mJ/pulse at 18.2 ns, and 0.416 mJ/pulse at 14.7 ns, respectively. This really is the initial implementation of a KGW crystal pumped by an electro-optic active Q-switched Tm:Yap laser within the SWIR spectral range. Keywords: solid state laser; two laser; Raman laser; KGW crystal; active Q-switch; electro-optics1. Introduction Lasers emitting at two improve a wide variety of applications since of their reasonably higher absorption coefficients and also the fascinating atmospheric window at this spectral variety. They are employed in LIDAR; microsurgery [1]; the processing of polymers, semiconductors, and metals [2]; defense applications; and gas sensing industries [3]. Even so, SWIR solid-state laser technology, in particular in the region of 2 , has yet to become completely mature, at the moment relying on a restricted array of doped-crystalline and rare-earth ions, for instance thulium, holmium, and chromium. The current technology allows the generation of laser sources in part on the two spectral variety, but doesn’t cover it entirely. Raman lasers leverage the principles of stimulated Raman scattering (SRS) to shift the light that comes into the crystal by a frequency corresponding towards the vibrational frequency of your material. Pumping Raman cavities at very high peak power densities enables frequency conversion and produces new laser lines and valuable high-brightness sources. This extends the spectral spans of existing lasers and fills the spectral gaps within this spectral variety [4]. Raman lasers have a couple of far more advantages, for example linewidth narrowing, pulse length shortening, and spatial beam quality improvement by means of Raman beam cleanup [8]. The get of a Raman laser is dependent on the pump intensity plus the gain coefficient of the Raman crystal material. You’ll find only a few publications on Raman lasers within the 2 region, primarily for two factors. The initial is the lack of suitable high power pump sources for this spectral variety. The second is the decrease within the Raman achieve coefficient at longer wavelengths, which is roughly proportional to inverse wavelength. The outcome of those two causes is reduce efficiency Raman lasers compared to VIS and NIR. The first demonstrations of SRS conversion in 2 utilizing Tm:KY(WO4 )two and BaWO4 crystals were reported more than a decade ago [9,10]. Even so, these reports are missing the information about the obtained output energy values. Because 2013, a number of studies have demonstrated cry.
