{"product_id":"bgs-baga4s7-nonlinear-crystal","title":"BGS (BaGa4S7) Mid-IR Nonlinear Crystal for OPO and OPA, 0.35–13.7 µm","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003eBGS (barium gallium sulfide, BaGa4S7) is a mid-infrared nonlinear crystal with a wide band gap of 3.54 eV and stable chemical properties. It transmits from 0.35 µm to 13.7 µm and shows no two-photon absorption at 1 µm, so it can be pumped directly by 1064 nm Nd:YAG lasers or by commercially common 1030 nm femtosecond lasers. WaveQuanta supplies BGS as oriented blanks and as coated elements for OPO, OPA, DFG, SFG and OPG.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTransmission range 0.35–13.7 µm (UV cut-off 350 nm, IR cut-off 13.7 µm)\u003c\/li\u003e\n\u003cli\u003eBand gap 3.54 eV\u003c\/li\u003e\n\u003cli\u003eNonlinear coefficient d33 = 12.7 pm\/V\u003c\/li\u003e\n\u003cli\u003eNo two-photon absorption at 1 µm, allowing pumping at 1064 nm or 1030 nm\u003c\/li\u003e\n\u003cli\u003eChemically stable\u003c\/li\u003e\n\u003cli\u003eFlatness λ\/8 @ 632.8 nm and parallelism 30″\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 pumped by 1064 nm Nd:YAG lasers\u003c\/li\u003e\n\u003cli\u003eOPA and OPG pumped by 1030 nm femtosecond lasers\u003c\/li\u003e\n\u003cli\u003eDifference-frequency generation (DFG) in the mid-IR\u003c\/li\u003e\n\u003cli\u003eSum-frequency generation (SFG)\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\u003e5 × 5 × 3 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 14°, φ = 0°, XZ-cut\u003c\/td\u003e\n\u003ctd\u003eAR\/AR @ 1.0–1.3 µm + 6–11 µm\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 9.8 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 12.5°, φ = 0°\u003c\/td\u003e\n\u003ctd\u003eS1: AR @ 1–1.3 µm; S2: P-coating @ 8 µm\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 × 5 × 10 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 13°, φ = 0°, XZ-cut\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8 × 8 × 2.5 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 47.6°, φ = 90°, YZ-cut\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8 × 8 × 3.5 mm\u003c\/td\u003e\n\u003ctd\u003eθ = 47.6°, φ = 90°, YZ-cut\u003c\/td\u003e\n\u003ctd\u003eBlank\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\/bgse-baga4se7-nonlinear-crystal\"\u003eBGSe Crystal\u003c\/a\u003e — selenide version\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/lgs-ligas2-nonlinear-crystal\"\u003eLGS Crystal\u003c\/a\u003e — 1 µm-pumped mid-IR\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aggs-aggages4-nonlinear-crystal\"\u003eAGGS Crystal\u003c\/a\u003e — wide transparency\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-BGS\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":68073586950298,"sku":"WQ-NLC-BGS","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/wq-bgs-baga4s7-nonlinear-crystal-1.jpg?v=1793968056","url":"https:\/\/waveqvanta.com\/products\/bgs-baga4s7-nonlinear-crystal","provider":"WaveQuanta","version":"1.0","type":"link"}