{"title":"Single Photon Detectors","description":"LBTEK's Single Photon Detectors are ultra-sensitive photodetectors based on Si-APD. The detection wavelength range covers 400-1100 nm and can operate in both linear mode and Geiger mode. In Geiger mode, the gain exceeds 60 dB. The SPD series features a unique high-performance active quenching circuit, enabling continuous single-photon detection and supporting detection gates of arbitrary width and period. This circuit achieves avalanche quenching with over 20 dB suppression, optimizing the performance of the SPD series. The SPD series detectors operate at a low temperature of -30 °C through internal cooling to achieve the best signal-to-noise ratio. The cooling module is controlled by an efficient TEC with a precision of ±0.2 °C. The effective photosensitive detection area of the detector can reach up to 300 μm. The single-photon counting signal is converted into a digital TTL signal and transmitted via an SMA interface. Its highly integrated modular design facilitates OEM applications and industrial integration.","products":[{"product_id":"single-photon-detector-photosensitive-area-300-μm-spd300a-apc","title":"Single-photon detector, photosensitive area 300 μm SPD300A-APC","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\u003cp\u003eLBTEK single-photon detectors achieve a detection efficiency exceeding 55% at 700 nm wavelength, with dark counts \u0026lt;500 cps and dead time less than 50 ns, designed for fiber optic input. In specific application scenarios, ensure the module's operating temperature does not exceed 50 °C, as excessively high temperatures may cause the APD's operating temperature to rise, leading to increased dark count levels. APDs are highly sensitive photodetection devices; during avalanche mode, the input optical signal intensity should be controlled. Excessive light intensity may damage the APD, potentially reducing its detection sensitivity or, in severe cases, causing diode breakdown.\u003c\/p\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDark count \u0026lt;500 cps (typical value)\u003c\/li\u003e\n  \u003cli\u003eSaturation count rate \u0026gt;10 Mcps\u003c\/li\u003e\n  \u003cli\u003eFiber optic input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-explain\"\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eQuantum Efficiency vs. Wavelength Diagram\u003c\/p\u003e\n\u003c\/div\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":47968826589338,"sku":"SPD300A-APC","price":2493.23,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/E5_8D_95_E5_85_89_E5_AD_90_E6_8E_A2_E6_B5_8B_E5_99_A8-Fj6px8Lu-JAY8FbNUoRHF8wjUnGd_5c8ff123-1ce1-4c2d-b89f-f34f46d1d6a6.jpg?v=1777897408"},{"product_id":"single-photon-detector-photosensitive-area-300-μm-spd300a-pc","title":"Single-photon detector, photosensitive area 300 μm SPD300A-PC","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\u003cp\u003eLBTEK single-photon detectors achieve a detection efficiency exceeding 55% at 700 nm wavelength, with dark counts \u0026lt;500 cps and dead time less than 50 ns, designed for fiber optic input. In specific application scenarios, ensure the module's operating temperature does not exceed 50 °C, as excessively high temperatures may cause the APD's operating temperature to rise, leading to increased dark count levels. APDs are highly sensitive photodetection devices; during avalanche mode, the input optical signal intensity should be controlled. Excessive light intensity may damage the APD, potentially reducing its detection sensitivity or, in severe cases, causing diode breakdown.\u003c\/p\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDark count \u0026lt;500 cps (typical value)\u003c\/li\u003e\n  \u003cli\u003eSaturation count rate \u0026gt;10 Mcps\u003c\/li\u003e\n  \u003cli\u003eFiber optic input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-explain\"\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eQuantum Efficiency vs. Wavelength Diagram\u003c\/p\u003e\n\u003c\/div\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":47968827474074,"sku":"SPD300A-PC","price":2493.23,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/E5_8D_95_E5_85_89_E5_AD_90_E6_8E_A2_E6_B5_8B_E5_99_A8-Fj6px8Lu-JAY8FbNUoRHF8wjUnGd_c15d000a-e29f-45ce-bf7a-67b1e39c64f1.jpg?v=1777897407"},{"product_id":"single-photon-detector-photosensitive-area-100-μm-spdm100b","title":"Single-photon detector, photosensitive area 100 μm SPDM100B","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003eLBTEK single-photon detectors operate at wavelengths of 400-1100 nm, with an anti-reflection coating applied in the 650-1100 nm range. They are available in two types: free-space input and fiber input, catering to different application scenarios. Three dark count specifications are available (\u0026lt;25 cps, \u0026lt;100 cps, \u0026lt;500 cps), making them suitable for weak light and single-photon detection applications. High light intensity may damage the APD, potentially reducing its detection sensitivity, and in severe cases, even causing diode breakdown. The module should operate within a temperature range of -20 to 50°C. Excessive temperature can intensify thermally excited carriers, leading to an increase in dark counts\u003cspan style=\"mso-spacerun: 'yes'; font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; font-size: 12.0000pt;\"\u003e\u003cspan style=\"font-family: 宋体;\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"left: 145.2px; top: 534.2958333333332px; font-size: 20px; font-family: sans-serif;\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDark Count Rate Minimum \u0026lt;25cps\u003c\/li\u003e\n  \u003cli\u003eSaturated Count Rate \u0026gt;15MHz\u003c\/li\u003e\n  \u003cli\u003eFree Space\/Fiber Input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-explain\"\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eQuantum Efficiency vs. Wavelength Diagram\u003c\/p\u003e\n\u003c\/div\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":47968827539610,"sku":"SPDM100B","price":4968.16,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/E4_BA_A7_E5_93_81_E9_9B_86_E5_B0_8F_E5_9B_BE-Flm5N0k0cqk8BisFIjz_LIScIjF7_3ff6c0bc-55d7-4fb8-be59-c8bdf93ebec9.jpg?v=1777897408"},{"product_id":"single-photon-detector-photosensitive-area-100-μm-spdm100b-pc","title":"Single-photon detector, photosensitive area 100 μm SPDM100B-PC","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003eLBTEK single-photon detectors operate at wavelengths of 400-1100 nm, with an anti-reflection coating applied in the 650-1100 nm range. They are available in two types: free-space input and fiber input, catering to different application scenarios. Three dark count specifications are available (\u0026lt;25 cps, \u0026lt;100 cps, \u0026lt;500 cps), making them suitable for weak light and single-photon detection applications. High light intensity may damage the APD, potentially reducing its detection sensitivity, and in severe cases, even causing diode breakdown. The module should operate within a temperature range of -20 to 50°C. Excessive temperature can intensify thermally excited carriers, leading to an increase in dark counts\u003cspan style=\"mso-spacerun: 'yes'; font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; font-size: 12.0000pt;\"\u003e\u003cspan style=\"font-family: 宋体;\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"left: 145.2px; top: 534.2958333333332px; font-size: 20px; font-family: sans-serif;\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDark Count Rate Minimum \u0026lt;25cps\u003c\/li\u003e\n  \u003cli\u003eSaturated Count Rate \u0026gt;15MHz\u003c\/li\u003e\n  \u003cli\u003eFree Space\/Fiber Input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-explain\"\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eQuantum Efficiency vs. Wavelength Diagram\u003c\/p\u003e\n\u003c\/div\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":47968827506842,"sku":"SPDM100B-PC","price":4968.16,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/E4_BA_A7_E5_93_81_E9_9B_86_E5_B0_8F_E5_9B_BE-Flm5N0k0cqk8BisFIjz_LIScIjF7_e7e6daf6-5aaa-40a2-be1c-9102acc9ca37.jpg?v=1777897409"},{"product_id":"single-photon-detector-photosensitive-area-100-μm-spdm25b","title":"Single-photon detector, photosensitive area 100 μm SPDM25B","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003eLBTEK single-photon detectors operate at wavelengths of 400-1100 nm, with an anti-reflection coating applied in the 650-1100 nm range. They are available in two types: free-space input and fiber input, catering to different application scenarios. Three dark count specifications are available (\u0026lt;25 cps, \u0026lt;100 cps, \u0026lt;500 cps), making them suitable for weak light and single-photon detection applications. High light intensity may damage the APD, potentially reducing its detection sensitivity, and in severe cases, even causing diode breakdown. The module should operate within a temperature range of -20 to 50°C. Excessive temperature can intensify thermally excited carriers, leading to an increase in dark counts\u003cspan style=\"mso-spacerun: 'yes'; font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; font-size: 12.0000pt;\"\u003e\u003cspan style=\"font-family: 宋体;\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"left: 145.2px; top: 534.2958333333332px; font-size: 20px; font-family: sans-serif;\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDark Count Rate Minimum \u0026lt;25cps\u003c\/li\u003e\n  \u003cli\u003eSaturated Count Rate \u0026gt;15MHz\u003c\/li\u003e\n  \u003cli\u003eFree Space\/Fiber Input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-explain\"\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eQuantum Efficiency vs. Wavelength Diagram\u003c\/p\u003e\n\u003c\/div\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":47968827736218,"sku":"SPDM25B","price":8498.18,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/E4_BA_A7_E5_93_81_E9_9B_86_E5_B0_8F_E5_9B_BE-Flm5N0k0cqk8BisFIjz_LIScIjF7_db2816c1-b8a0-4f7a-9f39-420243b18768.jpg?v=1777897409"},{"product_id":"single-photon-detector-photosensitive-area-100-μm-spdm25b-pc","title":"Single-photon detector, photosensitive area 100 μm SPDM25B-PC","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003eLBTEK single-photon detectors operate at wavelengths of 400-1100 nm, with an anti-reflection coating applied in the 650-1100 nm range. They are available in two types: free-space input and fiber input, catering to different application scenarios. Three dark count specifications are available (\u0026lt;25 cps, \u0026lt;100 cps, \u0026lt;500 cps), making them suitable for weak light and single-photon detection applications. High light intensity may damage the APD, potentially reducing its detection sensitivity, and in severe cases, even causing diode breakdown. The module should operate within a temperature range of -20 to 50°C. Excessive temperature can intensify thermally excited carriers, leading to an increase in dark counts\u003cspan style=\"mso-spacerun: 'yes'; font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; font-size: 12.0000pt;\"\u003e\u003cspan style=\"font-family: 宋体;\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"left: 145.2px; top: 534.2958333333332px; font-size: 20px; font-family: sans-serif;\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDark Count Rate Minimum \u0026lt;25cps\u003c\/li\u003e\n  \u003cli\u003eSaturated Count Rate \u0026gt;15MHz\u003c\/li\u003e\n  \u003cli\u003eFree Space\/Fiber Input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-explain\"\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eQuantum Efficiency vs. Wavelength Diagram\u003c\/p\u003e\n\u003c\/div\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":47968827768986,"sku":"SPDM25B-PC","price":8498.18,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/E4_BA_A7_E5_93_81_E9_9B_86_E5_B0_8F_E5_9B_BE-Flm5N0k0cqk8BisFIjz_LIScIjF7_bfc8ea66-205d-4c5d-92d5-a7e9831d192f.jpg?v=1777897408"},{"product_id":"single-photon-detector-photosensitive-area-100-μm-spdm500b","title":"Single-photon detector, photosensitive area 100 μm SPDM500B","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003eLBTEK single-photon detectors operate at wavelengths of 400-1100 nm, with an anti-reflection coating applied in the 650-1100 nm range. They are available in two types: free-space input and fiber input, catering to different application scenarios. Three dark count specifications are available (\u0026lt;25 cps, \u0026lt;100 cps, \u0026lt;500 cps), making them suitable for weak light and single-photon detection applications. High light intensity may damage the APD, potentially reducing its detection sensitivity, and in severe cases, even causing diode breakdown. The module should operate within a temperature range of -20 to 50°C. Excessive temperature can intensify thermally excited carriers, leading to an increase in dark counts\u003cspan style=\"mso-spacerun: 'yes'; font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; font-size: 12.0000pt;\"\u003e\u003cspan style=\"font-family: 宋体;\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"left: 145.2px; top: 534.2958333333332px; font-size: 20px; font-family: sans-serif;\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDark Count Rate Minimum \u0026lt;25cps\u003c\/li\u003e\n  \u003cli\u003eSaturated Count Rate \u0026gt;15MHz\u003c\/li\u003e\n  \u003cli\u003eFree Space\/Fiber Input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-explain\"\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eQuantum Efficiency vs. Wavelength Diagram\u003c\/p\u003e\n\u003c\/div\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":47968827834522,"sku":"SPDM500B","price":3007.05,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/E4_BA_A7_E5_93_81_E9_9B_86_E5_B0_8F_E5_9B_BE-Flm5N0k0cqk8BisFIjz_LIScIjF7_cc80cbb3-3f2a-4e01-a388-1a406cf257b9.jpg?v=1777897408"},{"product_id":"single-photon-detector-photosensitive-area-100-μm-spdm500b-pc","title":"Single-photon detector, photosensitive area 100 μm SPDM500B-PC","description":"\u003cdiv class=\"wq-pdp__lbtek-desc\"\u003e\n\u003cp\u003eLBTEK single-photon detectors operate at wavelengths of 400-1100 nm, with an anti-reflection coating applied in the 650-1100 nm range. They are available in two types: free-space input and fiber input, catering to different application scenarios. Three dark count specifications are available (\u0026lt;25 cps, \u0026lt;100 cps, \u0026lt;500 cps), making them suitable for weak light and single-photon detection applications. High light intensity may damage the APD, potentially reducing its detection sensitivity, and in severe cases, even causing diode breakdown. The module should operate within a temperature range of -20 to 50°C. Excessive temperature can intensify thermally excited carriers, leading to an increase in dark counts\u003cspan style=\"mso-spacerun: 'yes'; font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; font-size: 12.0000pt;\"\u003e\u003cspan style=\"font-family: 宋体;\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"left: 145.2px; top: 534.2958333333332px; font-size: 20px; font-family: sans-serif;\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-tips\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDark Count Rate Minimum \u0026lt;25cps\u003c\/li\u003e\n  \u003cli\u003eSaturated Count Rate \u0026gt;15MHz\u003c\/li\u003e\n  \u003cli\u003eFree Space\/Fiber Input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"wq-pdp__lbtek-explain\"\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eQuantum Efficiency vs. Wavelength Diagram\u003c\/p\u003e\n\u003c\/div\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":47968828391578,"sku":"SPDM500B-PC","price":3007.05,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/E4_BA_A7_E5_93_81_E9_9B_86_E5_B0_8F_E5_9B_BE-Flm5N0k0cqk8BisFIjz_LIScIjF7_145b2725-f69c-47e4-92ac-0d2124aaa4a4.jpg?v=1777897408"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/collections\/E4_BA_A7_E5_93_81_E9_9B_86_E5_B0_8F_E5_9B_BE-Flm5N0k0cqk8BisFIjz_LIScIjF7.jpg?v=1777884254","url":"https:\/\/waveqvanta.com\/collections\/lbtek-optomechanics-diy-microscopic-mounts-single-photon-detectors.oembed","provider":"WaveQuanta","version":"1.0","type":"link"}