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深圳市所在地
| 对比 | 型号 | 光谱范围 | 可测量功率1 | 最小可测量功率2 |
 | 818-UV/DB 紫外探测器，200-1100 nm，DB15 校准模块 | 200 - 1100 nm | 20 pW | 1500 mW |
 | 818-SL/DB 硅探测器，400-1100 nm，DB15 校准模块 | 400 - 1100 nm | 20 pW | 2000 mW |
 | 818-IR/DB 锗探测器，780-1800 nm，DB15 校准模块 | 780 - 1800 nm | 5 nW | 2000 mW |
 | 818-IG/DB InGaAs 探测器，800-1650 nm，DB15 校准模块 | 800 - 1650 nm | 20 pW | 2000 mW |
产品规格
| 型号 |  |  |  |  |
| 818-UV/DB | 818-SL/DB | 818-IR/DB | 818-IG/DB | |
| 感光尺寸 | Ø10 mm | Ø11.3 mm | Ø3 mm | Ø3 mm |
| 光谱范围 | 200 - 1100 nm | 400 - 1100 nm | 780 - 1800 nm | 800 - 1650 nm |
| 可测量功率 | 1500 mW | 2000 mW | 2000 mW | 2000 mW |
| 可测量功率（无衰减器） | 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（无衰减器） | 0.2 W/cm2 | 3 W/cm2 | 3 W/cm2 | 3 W/cm2 |
| 脉冲能量（无衰减器） | 0.4 µJ | 60 nJ | 60 nJ | 60 nJ |
| 校准不确定度（带衰减器） | ±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 |
| 校准不确定度（无衰减器） | ±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 |
| 衰减器 | OD3, Threaded | OD3, Threaded | OD3, Threaded | OD3, Threaded |
| 线性度 | ±0.5 % | ±0.5 % | ±0.5 % | ±0.5 % |
| 均匀性 | ±2 % over Ø2 mm with attenuator, ±2 % over Ø4 mm without attenuator | ±2 % | ±2 % | ±2 % @ 1550 nm |
| 上升时间 | 3 µs | ≤2 µs | ≤2 µs | ≤2 µs |
| 端口类型 | DB15 | DB15 | DB15 | DB15 |
| 通光孔径 | 10.3 mm | 10.3 mm | 10.3 mm | 10.3 mm |
| 探测器材料 | UV Enhanced Silicon | Silicon | Germanium | Indium Gallium Arsenide |
| 探测器输入 | Free Space | Free Space | Free Space | Free Space |
| Calibration Module | DB15 removable | DB15 removable | DB15 removable | DB15 removable |
| 最小可测量功率 | 20 pW | 20 pW | 5 nW | 20 pW |
| 电缆长度 | 1.5 m | 1.5 m | 1.5 m | 1.5 m |
| 有衰减器时的脉冲能量 | 400 µJ | 60 µJ | 60 µJ | 60 uJ |
| 探测器类型 | Post Mounted | Post Mounted | Germanium Sensor | Post Mounted |
| 特征 | ||
| Excellent Photodiode Linearity | Responsivity Variation over Temperature | |
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| 全不锈钢结构 | 全不锈钢结构 | |
| 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. | ||
| 最严格的校准不确定性 918D 系列包括一个采用 NIST 可追溯标准，利用 Newport 光学探头校准设施维护的高精度设备完成的全光谱响应校准。严格的校准设备和过程控制可实现业内的校准不确定性。每个探头都附有校准数据，这些数据以电子形式存储在探测器的 EEPROM 中。每个探头都附有校准证书以及衰减器模式和无衰减器模式下的实际校准曲线和数据。为了保持精度、保证性能，Newport 建议每年对光电二极管探头进行校准。 |  | |
| Detector calibration system block diagram. | ||
 | 宽动态范围（具有内置衰减器） 的 OD3 衰减技术将我们探测器的校准光学动态范围扩展了三个数量级。我们的衰减器设计提供高损伤阈值和光谱平坦度。通过与 Newport 正在使用的光电二极管相关联的低 NEP，实现了更宽的动态范围。对于小于 1 mW 的输入功率，我们建议将衰减器置于 OFF 位置（对于 918D-UV-OD3R 在 200 - 400 nm 之间则为 0.1 mW），使信噪比达到。该衰减器的通光孔径为 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. |  | |
| 全不锈钢结构 | ||
 | 关于探测器接头的注意事项 818 系列探头带有可拆卸校准模块的 BNC 连接器。/DB 后缀表示 DB15 样式校准模块，该模块与 Newport 的当前功率计直接兼容。带有 /CM 后缀的型号（仅在购买时可离线使用）附带传统的 8 针 迷你 DIN 模块。BNC 连接器型号 818-xx 不再可用。购买 818-xx/DB 时，只需简单拆除校准模块。 | |
| 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. |  | |
| 全不锈钢结构 | ||
| 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. | ||
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| 全不锈钢结构 | 全不锈钢结构 | |
