- NIST 可追蹤校準具有比同類產(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
- 可拆卸校準模塊
- 波長范圍為 200-1800 nm
- 可移動校準 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(guī)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（無衰減器） | 0.2 W/cm2 | 3 W/cm2 | 3 W/cm2 | 3 W/cm2 |
| 脈沖能量（無衰減器） | 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 |
| 上升時間 | 3 µs | ≤2 µs | ≤2 µs | ≤2 µs |
| 端口類型 | 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 |
| 電纜長度 | 1.5 m | 1.5 m | 1.5 m | 1.5 m |
| 有衰減器時的脈沖能量 | 400 µJ | 60 µJ | 60 µJ | 60 uJ |
| 探測器類型 | Post Mounted | Post Mounted | Germanium Sensor | Post Mounted |
| 特征 | ||
| Excellent Photodiode Linearity | Responsivity Variation over Temperature | |
 |  | |
| 全不銹鋼結(jié)構 | 全不銹鋼結(jié)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 系列包括一個采用 NIST 可追溯標準，利用 Newport 光學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程控制可實現(xiàn)業(yè)內(nèi)的校準不確定性。每個探頭都附有校準數(shù)據(jù)，這些數(shù)據(jù)以電子形式存儲在探測器的 EEPROM 中。每個探頭都附有校準證書以及衰減器模式和無衰減器模式下的實際校準曲線和數(shù)據(jù)。為了保持精度、保證性能，Newport 建議每年對光電二極管探頭進行校準。 |  | |
| Detector calibration system block diagram. | ||
 | 寬動態(tài)范圍（具有內(nèi)置衰減器） 的 OD3 衰減技術將我們探測器的校準光學動態(tài)范圍擴展了三個數(shù)量級。我們的衰減器設計提供高損傷閾值和光譜平坦度。通過與 Newport 正在使用的光電二極管相關聯(lián)的低 NEP，實現(xiàn)了更寬的動態(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(jié)構 | ||
| 關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（僅在購買時可離線使用）附帶傳統(tǒng)的 8 針 迷你 DIN 模塊。BNC 連接器型號 818-xx 不再可用。購買 818-xx/DB 時，只需簡單拆除校準模塊。 | ||
| 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(jié)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(jié)構 | 全不銹鋼結(jié)構 | |
