{"product_id":"bgse-baga4se7-nonlinear-crystal","title":"BGSe (BaGa4Se7) Nonlinear Crystal for Mid-IR, 0.47–18 µm, d11 = 24 pm\/V","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003eBGSe (BaGa4Se7) is the selenide analogue of BaGa4S7 and a comparatively new mid-infrared nonlinear crystal, grown by the Bridgman–Stockbarger technique. It transmits from 0.47 to 18 µm, apart from an absorption peak near 15 µm, and combines a nonlinear coefficient of d11 = 24 pm\/V with a surface damage threshold of 557 MW\/cm² at 1.064 µm. WaveQuanta supplies BGSe as oriented blanks, polished elements and coated elements for OPO, OPA and DFG with pump sources from 1 to 3 µm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eNote: BGSe is a newly developed crystal and individual pieces may contain a few internal streaks. These do not affect stable performance, and returns are not accepted on the grounds of such streaks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTransmission range 0.47–18 µm, with an absorption peak near 15 µm\u003c\/li\u003e\n\u003cli\u003eNonlinear coefficient d11 = 24 pm\/V; powder SHG response about 2–3 times that of AgGaS2\u003c\/li\u003e\n\u003cli\u003eSurface damage threshold 557 MW\/cm² at 1.064 µm (5 ns), about 3.7 times that of AgGaS2 under the same conditions\u003c\/li\u003e\n\u003cli\u003eAccepts pump sources from 1 to 3 µm, with tunable output over 3–18 µm\u003c\/li\u003e\n\u003cli\u003eThermal expansion with low anisotropy: 9.24–11.70 × 10⁻⁶ \/K along the three axes\u003c\/li\u003e\n\u003cli\u003eAbout 65% transmittance over 1–14 µm through a polished 2 mm thick (001) plate\u003c\/li\u003e\n\u003cli\u003eShows terahertz phonon-polaritons and is studied for THz generation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMid-IR OPO and OPA pumped at 1–3 µm\u003c\/li\u003e\n\u003cli\u003eDifference-frequency generation (DFG) for tunable 3–18 µm output\u003c\/li\u003e\n\u003cli\u003eIntracavity and extracavity frequency conversion, with CW or pulsed pumping\u003c\/li\u003e\n\u003cli\u003eTerahertz generation research\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eStandard Sizes\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eCut \/ orientation\u003c\/th\u003e\n\u003cth\u003eSurface \/ coating\u003c\/th\u003e\n\u003cth\u003eMount\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e3 × 3 × 5 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 42°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3 × 7 × 15 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 40.5°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3 × 7 × 20 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 40.5°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3 × 7 × 30 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 40.5°, φ = 0°, Type I, XZ-cut\u003c\/td\u003e\n\u003ctd\u003eS1: AR @ 1–1.5 µm (R \u0026lt; 0.2%); S2: HT @ 10–16 µm + 1–1.5 µm (R \u0026lt; 4%)\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 1 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 40.5°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eS1: AR @ 1–3 µm; S2: AR @ 3–20 µm\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 1.5 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 40.5°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 1.5 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 40.5°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eS1: AR @ 1–3 µm; S2: AR @ 3–20 µm\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 2 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 40.5°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 2 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 40.5°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eS1: AR @ 1–3 µm; S2: AR @ 3–20 µm\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 3 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 60°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003ePolished, uncoated\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 4 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 60°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 6 × 5 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 10°, φ = 90°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7 × 7 × 2 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 44°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7 × 7 × 2 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 44°, φ = 0°, XZ-cut\u003c\/td\u003e\n\u003ctd\u003eS1: HT @ 1.4–2.3 µm; S2: HT @ 5–9 µm\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7.2 × 6.4 × 2.3 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 47°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7.2 × 6.4 × 3.3 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 47°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 × 10 × 1 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 43°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003ePolished, uncoated\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAvailability of individual sizes changes; custom sizes, cut angles and coatings are available on request.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bgs-baga4s7-nonlinear-crystal\"\u003eBGS Crystal\u003c\/a\u003e — sulfide version\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bggse-baga2gese6-nonlinear-crystal\"\u003eBGGSe Crystal\u003c\/a\u003e — larger d11\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/zgp-zngep2-nonlinear-crystal\"\u003eZGP Crystal\u003c\/a\u003e — 2 µm-pumped OPO\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBrowse all: \u003ca href=\"\/collections\/wq-uo-mid-ir-crystals\"\u003eMid-IR Nonlinear Crystals\u003c\/a\u003e · \u003ca href=\"\/collections\/wq-ultrafast-optics-crystals\"\u003eNonlinear Crystals\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eModel: WQ-NLC-BGSE\u003c\/strong\u003e · Custom sizes, orientations and coatings on request — contact WaveQuanta for a quote and lead time.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":68073589768346,"sku":"WQ-NLC-BGSE","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/wq-bgse-baga4se7-nonlinear-crystal-1.jpg?v=1793964964","url":"https:\/\/waveqvanta.com\/products\/bgse-baga4se7-nonlinear-crystal","provider":"WaveQuanta","version":"1.0","type":"link"}