- NIST 可追蹤校準具有比同類(lèi)產(chǎn)品具有更好的不確定度
- 10 mm 通光孔徑衰減器設計已改進(jìn)
- 可拆卸校準模塊
- 波長(cháng)范圍為 200-1800 nm
- 可移動(dòng)校準 OD3 衰減器
| 對比 | 型號 | 光譜范圍 | 可測量功率1 | 最小可測量功率2 |
 | 818-UV/DB 紫外探測器，200-1100 nm，DB15 校準模塊 | 200 - 1100 nm | 20 pW | 1500 mW |
 | 818-SL/DB 硅探測器，400-1100 nm，DB15 校準模塊 | 400 - 1100 nm | 20 pW | 2000 mW |
 | 818-IR/DB 鍺探測器，780-1800 nm，DB15 校準模塊 | 780 - 1800 nm | 5 nW | 2000 mW |
 | 818-IG/DB InGaAs 探測器，800-1650 nm，DB15 校準模塊 | 800 - 1650 nm | 20 pW | 2000 mW |
注釋:
- When used with 1936-R or 2936-R benchtop optical power meter.
- When used with a 1830-R, 1918-R, 1936-R, or 2936-R benchtop optical power meter.
產(chǎn)品規格
| 型號 |  |  |  |  |
| 818-UV/DB | 818-SL/DB | 818-IR/DB | 818-IG/DB | |
| 感光尺寸 | ?10 mm | ?11.3 mm | ?3 mm | ?3 mm |
| 光譜范圍 | 200 - 1100 nm | 400 - 1100 nm | 780 - 1800 nm | 800 - 1650 nm |
| 可測量功率 | 1500 mW | 2000 mW | 2000 mW | 2000 mW |
| 可測量功率（無(wú)衰減器） | 5 mW (200 - 400 nm); 2.5 mW (400 - 600 nm, >1050 nm) , 1.5 mW (600 - 1050 nm) | 4 mW with 1830-R and 1936-R, 2.5 mW with 843-R, 1919-R, and 841-PE-USB | 10 mW (1918-R, 1936-R/2936-R), 1.3 mW (843-R, 1919-R, 841-PE-USB) | 10 mW (1830-R, 1918-R, 1936-R/2936-R), 1.3 mW (843-R, 1919-R, 841-PE-USB) |
| 功率密度 | 30 W/cm2 | 30 W/cm2 | 30 W/cm2 | 30 W/cm2 |
| 功率密度（無(wú)衰減器） | 0.2 W/cm2 | 3 W/cm2 | 3 W/cm2 | 3 W/cm2 |
| 脈沖能量（無(wú)衰減器） | 0.4 µJ | 60 nJ | 60 nJ | 60 nJ |
| 校準不確定度（帶衰減器） | ±8% @ 200-219nm ±2% @ 220-349nm ±1% @ 350-949nm ±4% @ 950-1100nm | ±1% @ 400-940nm ±4% @ 941-1100nm | ±5% @ 780-910nm ±2% @ 911-1700nm ±4% @ 1701-1800 nm | ±5% @ 800-900nm ±2% @ 901-1650nm |
| 校準不確定度（無(wú)衰減器） | ±4% @ 200-219nm ±2% @ 220-349nm ±1% @ 350-949nm ±4% @ 950-1100 nm | ±1% @ 400-940nm ±4% @ 941-1100 nm | ±2% @ 780-910nm ±2% @ 911-1700nm ±4%@1701-1800 nm | ±2% @ 800-900 nm ±2% @ 901-1650 nm |
| 衰減器 | OD3, Threaded | OD3, Threaded | OD3, Threaded | OD3, Threaded |
| 線(xiàn)性度 | ±0.5 % | ±0.5 % | ±0.5 % | ±0.5 % |
| 均勻性 | ±2 % over ?2 mm with attenuator, ±2 % over ?4 mm without attenuator | ±2 % | ±2 % | ±2 % @ 1550 nm |
| 上升時(shí)間 | 3 µs | ≤2 µs | ≤2 µs | ≤2 µs |
| 端口類(lèi)型 | DB15 | DB15 | DB15 | DB15 |
| 通光孔徑 | 10.3 mm | 10.3 mm | 10.3 mm | 10.3 mm |
| 探測器材料 | UV Enhanced Silicon | Silicon | Germanium | Indium Gallium Arsenide |
| 探測器輸入 | Free Space | Free Space | Free Space | Free Space |
| Calibration Module | DB15 removable | DB15 removable | DB15 removable | DB15 removable |
| 最小可測量功率 | 20 pW | 20 pW | 5 nW | 20 pW |
| 電纜長(cháng)度 | 1.5 m | 1.5 m | 1.5 m | 1.5 m |
| 有衰減器時(shí)的脈沖能量 | 400 µJ | 60 µJ | 60 µJ | 60 uJ |
| 探測器類(lèi)型 | Post Mounted | Post Mounted | Germanium Sensor | Post Mounted |
| 特征 | ||
| Excellent Photodiode Linearity | Responsivity Variation over Temperature | |
 |  | |
| 全不銹鋼結構 | 全不銹鋼結構 | |
| These photodiodes show excellent linearity over a large dynamic range. This is ideal for use in applications that require high accuracy measurements down to the pW level, especially when combined with a high sensitivity power meter that can accommodate the large dynamic range of the optical signal. | A natural characteristic of a photodiode is for the its optical response to change as the temperature changes near the bandgap of semiconductor materials. Newport’s 918D series sensors feature a thermocouple near the photodiode, which allows certain Newport meters to read the temperature and automatically adjust the responsivity, ensuring the most accurate measurements. | |
| Factors that Affect Maximum Measurable Power | ||
| The maximum measurable power of photodiode sensors is dependent on several factors such as the wavelength of incoming light, photodiode current output saturation, temperature, use of an attenuator and a power meter's maximum current input value. Newport provides maximum power specifications based on the power meter models, with and without an attenuator, and wavelength-dependent maximum power level. With these factors affecting measurable power in mind, choosing the proper detector for your application is critical. | ||
| 最嚴格的校準不確定性 918D 系列包括一個(gè)采用 NIST 可追溯標準，利用 Newport 光學(xué)探頭校準設施維護的高精度設備完成的全光譜響應校準。嚴格的校準設備和過(guò)程控制可實(shí)現業(yè)內的校準不確定性。每個(gè)探頭都附有校準數據，這些數據以電子形式存儲在探測器的 EEPROM 中。每個(gè)探頭都附有校準證書(shū)以及衰減器模式和無(wú)衰減器模式下的實(shí)際校準曲線(xiàn)和數據。為了保持精度、保證性能，Newport 建議每年對光電二極管探頭進(jìn)行校準。 |  | |
| Detector calibration system block diagram. | ||
 | 寬動(dòng)態(tài)范圍（具有內置衰減器） 的 OD3 衰減技術(shù)將我們探測器的校準光學(xué)動(dòng)態(tài)范圍擴展了三個(gè)數量級。我們的衰減器設計提供高損傷閾值和光譜平坦度。通過(guò)與 Newport 正在使用的光電二極管相關(guān)聯(lián)的低 NEP，實(shí)現了更寬的動(dòng)態(tài)范圍。對于小于 1 mW 的輸入功率，我們建議將衰減器置于 OFF 位置（對于 918D-UV-OD3R 在 200 - 400 nm 之間則為 0.1 mW），使信噪比達到。該衰減器的通光孔徑為 10.3mm。 | |
| Removable OD3 Attenuator For less than 1 mW input power (or 0.1 mW for 818-UV/DB between 200-400 nm), removing the OD3 attenuator by unscrewing it from the detector head is recommended to maximize the signal-to-noise ratio. |  | |
| 全不銹鋼結構 | ||
 | 關(guān)于探測器接頭的注意事項 818 系列探頭帶有可拆卸校準模塊的 BNC 連接器。/DB 后綴表示 DB15 樣式校準模塊，該模塊與 Newport 的當前功率計直接兼容。帶有 /CM 后綴的型號（僅在購買(mǎi)時(shí)可離線(xiàn)使用）附帶傳統的 8 針 迷你 DIN 模塊。BNC 連接器型號 818-xx 不再可用。購買(mǎi) 818-xx/DB 時(shí)，只需簡(jiǎn)單拆除校準模塊。 | |
| Additional Functionality with BNC Connector The BNC connector extends the functionality of the 818 Series photodiode sensors. It enables direct connection to an ammeter or lock-in amplifier. It also allows the detector output to be viewed on an oscilloscope after first connecting it to a current-to-voltage preamplifier, such as Newport's model 70710. Furthermore, the cable length can be extended by connecting another BNC cable. |  | |
| 全不銹鋼結構 | ||
| Adapters for Fiber-Optic Applications | ||
| These photodiode sensors can be converted to measure optical power from connectorized or bare optical fibers. Newport offers a comprehensive set of screw-in fiber-optic adapters to match a variety of connector types. Our bare fiber holder and adapter mountare designed together to hold 250-µm bare fibers without damaging the fiber. | ||
 |  | |
| 全不銹鋼結構 | 全不銹鋼結構 | |
