{"title":"Periodically Poled Crystals","description":"\u003cp\u003eQuasi-phase-matched PPLN and PPKTP crystals for SHG, OPO, DFG and photon-pair generation. Custom sizes, cut angles and coatings are available on request.\u003c\/p\u003e","products":[{"product_id":"ppln-periodically-poled-lithium-niobate-crystal","title":"PPLN (Periodically Poled LiNbO3) Crystal for SHG, OPO and DFG, 0.4–4.5 µm","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003ePPLN (periodically poled lithium niobate) is a quasi-phase-matched nonlinear crystal transparent from 0.4 to 4.5 µm, covering the visible, near-IR and mid-IR. With an effective nonlinear coefficient of about 17.3 pm\/V, it allows single-pass conversion efficiencies of up to 80% with pulsed lasers. MgO-doped PPLN (MgO:PPLN) has a much higher damage threshold and is the standard choice for high-power operation.\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\u003eTransparency range 0.4–4.5 µm\u003c\/li\u003e\n\u003cli\u003eEffective nonlinear coefficient about 17.3 pm\/V\u003c\/li\u003e\n\u003cli\u003eSingle-pass conversion efficiency of up to 80% with pulsed lasers\u003c\/li\u003e\n\u003cli\u003eMgO:PPLN version with a higher damage threshold for high-power use\u003c\/li\u003e\n\u003cli\u003eOPO and OPA pumped at 1064 nm or 1550 nm give continuously tunable 1.5–4.5 µm output\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\u003eSHG of 1064 nm to 532 nm for compact green lasers, and of 1550 nm to 775 nm for fiber-laser frequency doubling\u003c\/li\u003e\n\u003cli\u003eSum-frequency generation (SFG)\u003c\/li\u003e\n\u003cli\u003eOPO and OPA pumped at 1064 nm or 1550 nm, tunable over 1.5–4.5 µm\u003c\/li\u003e\n\u003cli\u003eDifference-frequency generation (DFG)\u003c\/li\u003e\n\u003cli\u003eTunable OPO light sources, ultrafast spectroscopy and quantum optics experiments\u003c\/li\u003e\n\u003c\/ul\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\/ppktp-periodically-poled-ktp-crystal\"\u003ePPKTP Crystal\u003c\/a\u003e — higher damage threshold\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ktp-potassium-titanyl-phosphate-crystal\"\u003eKTP Crystal\u003c\/a\u003e — bulk KTP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBrowse all: \u003ca href=\"\/collections\/wq-uo-periodically-poled\"\u003ePeriodically Poled 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-PPLN\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":68073586229402,"sku":"WQ-NLC-PPLN","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/wq-ppln-periodically-poled-lithium-niobate-crystal-1.jpg?v=1793968050"},{"product_id":"ppktp-periodically-poled-ktp-crystal","title":"PPKTP (Periodically Poled KTiOPO4) Crystal for SPDC and SHG, up to 30 mm","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003ePeriodically poled potassium titanyl phosphate (PPKTP) is a ferroelectric nonlinear crystal with a periodically reversed domain structure for quasi-phase-matching (QPM). QPM uses the largest nonlinear coefficient, d33 = 16.9 pm\/V, without spatial walk-off and allows phase matching across the crystal's transparency range. WaveQuanta supplies PPKTP made to order for SPDC, SHG, SFG, DFG\/OPO and backward-wave OPO designs.\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\u003eQuasi-phase-matched interaction using d33 = 16.9 pm\/V, with no spatial walk-off\u003c\/li\u003e\n\u003cli\u003eDesigns for process wavelengths from 390 nm to 3400 nm, with poling periods from 400 nm\u003c\/li\u003e\n\u003cli\u003eCrystal lengths from 1 mm up to 30 mm\u003c\/li\u003e\n\u003cli\u003eOptical apertures up to 4 × 4 mm² on request\u003c\/li\u003e\n\u003cli\u003eBandwidth, temperature setpoint and output polarizations can be engineered for the application\u003c\/li\u003e\n\u003cli\u003eAperiodic poling available for SPDC with high spectral purity\u003c\/li\u003e\n\u003cli\u003eOptional AR and HR coatings\u003c\/li\u003e\n\u003cli\u003eFor a quote, specify process wavelengths, input\/output polarizations, crystal length, aperture and coatings\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\u003eSpontaneous parametric down-conversion (SPDC) for entangled photon pairs, squeezed states, quantum key distribution and ghost imaging\u003c\/li\u003e\n\u003cli\u003eSecond harmonic generation, e.g. green light from lasers around 1 µm\u003c\/li\u003e\n\u003cli\u003eSum-frequency generation for upconversion detection, spectroscopy, biomedical imaging and sensing\u003c\/li\u003e\n\u003cli\u003eDifference-frequency generation, OPOs and OPAs for spectroscopy, sensing and communications\u003c\/li\u003e\n\u003cli\u003eBackward-wave OPOs (BWOPO) using counter-propagating interactions in compact designs\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\u003e1 × 5 × 19 mm (crystal 1 × 6 × 19.6 mm)\u003c\/td\u003e\n\u003ctd\u003eType II, period 9.96 µm\u003c\/td\u003e\n\u003ctd\u003eBlank\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 × 1.5 × 2 mm (crystal 1 × 4.5 × 2 mm)\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003eAR\/AR @ 1025–1060 nm (R \u0026lt; 0.2%) + 2000–2500 nm (R \u0026lt; 1.5%)\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 × 2 × 10 mm\u003c\/td\u003e\n\u003ctd\u003ePeriod 9 µm\u003c\/td\u003e\n\u003ctd\u003eS1: HR @ 532 + 1064 nm (R \u0026gt; 99.9%); S2: AR @ 532 + 1064 nm (R \u0026lt; 0.1%)\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 × 2 × 4 mm\u003c\/td\u003e\n\u003ctd\u003eType II, period 46.2 µm\u003c\/td\u003e\n\u003ctd\u003eS1: AR @ 750–800 nm (R \u0026lt; 0.5%) + 1500–1600 nm (R \u0026lt; 0.5%); S2: AR @ 750–800 nm (R \u0026lt; 3%)\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 × 2 × 10 mm\u003c\/td\u003e\n\u003ctd\u003eType 0, period 3.17 µm\u003c\/td\u003e\n\u003ctd\u003eAR\/AR @ 795 + 397 nm\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 × 2 × 10 mm\u003c\/td\u003e\n\u003ctd\u003ePeriod 4.15 µm\u003c\/td\u003e\n\u003ctd\u003eS1: AR @ 852 nm (R ≤ 1%); S2: AR @ 852 + 426 nm (R ≤ 1%)\u003c\/td\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 × 2 × 18 mm\u003c\/td\u003e\n\u003ctd\u003ePeriod 4.15 µm\u003c\/td\u003e\n\u003ctd\u003eS1: AR @ 852 nm (R ≤ 1%); S2: AR @ 852 + 426 nm (R ≤ 1%)\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\/ppln-periodically-poled-lithium-niobate-crystal\"\u003ePPLN Crystal\u003c\/a\u003e — larger nonlinear coefficient\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ktp-potassium-titanyl-phosphate-crystal\"\u003eKTP Crystal\u003c\/a\u003e — bulk KTP\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/kta-potassium-titanyl-arsenate-crystal\"\u003eKTA Crystal\u003c\/a\u003e — mid-IR OPO\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBrowse all: \u003ca href=\"\/collections\/wq-uo-periodically-poled\"\u003ePeriodically Poled 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-PPKTP\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":68073588621466,"sku":"WQ-NLC-PPKTP","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/wq-ppktp-periodically-poled-ktp-crystal-1.jpg?v=1793964954"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/collections\/wq-ppktp-periodically-poled-ktp-crystal-1.jpg?v=1793965015","url":"https:\/\/waveqvanta.com\/collections\/wq-uo-periodically-poled.oembed","provider":"WaveQuanta","version":"1.0","type":"link"}