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符合 RoHs 標(biāo)準(zhǔn)的 918D 系列光電二極管傳感器是校準(zhǔn)光電二極管傳感器，有著可提高性能的高級功能。

在市場上具有最小的校準(zhǔn)不確定性
用于熱漂移補償?shù)膬?nèi)部溫度傳感器
集成衰減器，可選擇范圍為 10X 到 1000X
衰減器開/關(guān)傳感器
自由空間和光纖測量
符合 RoHS 標(biāo)準(zhǔn)

對比	型號	光譜范圍	可測量功率1	最小可測量功率2
	918D-IG-OD1R InGaAs 探測器，800-1650 nm，OD1 衰減器，DB15	800 - 1650 nm	100 mW	20 pW
	918D-IG-OD2R InGaAs 探測器，800-1650 nm，OD2 衰減器，DB15	800 - 1650 nm	1000 mW	20 pW
	918D-IG-OD3R InGaAs 探測器，800-1650 nm，OD3 衰減器，DB15	800 - 1650 nm	2000 mW	20 pW
	918D-IR-OD1R 鍺探測器，780-1800 nm，OD1 衰減器，DB15	780 - 1800 nm	100 mW	5 nW
	918D-IR-OD2R 鍺探測器，780-1800 nm，OD2 衰減器，DB15	780 - 1800 nm	1000 mW	5 nW
	918D-IR-OD3R 鍺探測器，780-1800 nm，OD3 衰減器，DB15	780 - 1800 nm	2000 mW	5 nW
	918D-SL-OD1R 硅探測器，400-1100 nm，OD1 衰減器，DB15 連接器	400 - 1100 nm	40 mW	20 pW
	918D-SL-OD2R 硅探測器，400-1100 nm，OD2 衰減器，DB15	400 - 1100 nm	400 mW	20 pW
	918D-SL-OD3R 硅探測器，400-1100 nm，OD3 衰減器，DB15	400 - 1100 nm	2000 mW	20 pW
	918D-UV-OD3R 紫外硅探測器，200-1100 nm，OD3 衰減器，DB15	200 - 1100 nm	200 mW	20 pW

注釋:
When used with a 1830-R, 1918-R, 1936-R, or 2936-R benchtop optical power meter.
When used with a 1936-R or 2936-R benchtop optical power meter.

產(chǎn)品規(guī)格

型號
型號	918D-SL-OD3R	918D-IG-OD3R	918D-IR-OD3R	918D-UV-OD3R
探測器類型	Post Mounted	Post Mounted	Post Mounted	Post Mounted
探測器輸入	Free Space	Free Space	Free Space	Free Space
探測器材料	Silicon	Indium Gallium Arsenide	Germanium	UV Enhanced Silicon
光譜范圍	400 - 1100 nm	800 - 1650 nm	780 - 1800 nm	200 - 1100 nm
通光孔徑	10.3 mm	10.3 mm	10.3 mm	10.3 mm
感光尺寸	?11.3 mm	?3 mm	?3 mm	?11.3 mm
衰減器 1	OD3, Built-in	OD3, Built-in	OD3, Built-in	OD3, Built-in
可測量功率	2000 mW	2000 mW	2000 mW	200 mW
功率密度	30 W/cm2	30 W/cm2	30 W/cm2	30 W/cm2
功率密度（無衰減器）	3 W/cm2	3 W/cm2	3 W/cm2	0.2 W/cm2
有衰減器時的脈沖能量	5 uJ	5 uJ	5 uJ	500 nJ
脈沖能量（無衰減器）	5 nJ	5 nJ	5 nJ	0.5 nJ
線性度	±0.5 %	±0.5 %	±0.5 %	±0.5 %
均勻性	±2 %	±2 % @ 1550 nm	±2 %	±2 %
上升時間	≤2 µs	≤2 µs	≤2 µs	≤5.9 µs
Calibration Module	DB15 Connector Pigtail	DB15 Connector Pigtail	DB15 Connector Pigtail	DB15 Connector Pigtail
校準(zhǔn)不確定度（無衰減器）	±1% @ 400-940 nm ±4% @ 941-1100 nm	±2% @ 800-900 nm ±2% @ 901-1650 nm	±2% @ 780-910 nm ±2% @ 911-1700 nm 4%@1701-1800 nm	±4% @ 200-219 nm ±2% @ 220-349 nm 1% @ 350-949 nm 4% @ 950-1100 nm
端口類型	DB15	DB15	DB15	DB15
工作溫度范圍	5 to 50°C	5 to 50°C	5 to 50°C	5 to 50°C
工作濕度	<70% RH	<70% RH	<70% RH	<70% RH
RoHS	Compliant	Compliant	Compliant	Compliant
校準(zhǔn)不確定度（帶衰減器）	±1% @ 400-940 nm ±4% @ 941-1100nm	±5% @ 800-900 nm ±2% @ 901-1650 nm	±5% @ 780-910 nm ±2% @ 911-1700 nm 4% @ 1701-1800 nm	±8% @ 200-219 nm ±2% @ 220-349 nm 1% @ 350-949 nm 4% @ 950-1100 nm
可測量功率（無衰減器）	4 mW (1830-R, 1918-R and 1936-R), 2.5 mW (843-R, 1919-R, and 841-PE-USB)	10 mW (1830-R, 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)	0.3 mW (200 - 400 nm) 0.1 mW (400 - 600 nm, >1050 nm) 0.07 mW (600 - 1050 nm)
最小可測量功率	20 pW	20 pW	5 nW	20 pW
電纜長度	2 m	2 m	2 m	2 m

注釋:
Versions with OD1 and OD2 attenuators are also available.

特征

Excellent Photodiode Linearity		Responsivity Variation over Temperature

全不銹鋼結(jié)構(gòu)		全不銹鋼結(jié)構(gòu)
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

增強功能 918D 系列光電二極管探頭通過*功能提升性能，旨在使其優(yōu)于 Newport 經(jīng)過業(yè)內(nèi)驗證的 818 系列校準(zhǔn)光電二極管探頭。它們具有集成的校準(zhǔn)數(shù)據(jù)存儲器、內(nèi)置 OD1、OD2 或 OD3 衰減片（帶有電子衰減片開/關(guān)傳感器）以及用于溫度漂移補償?shù)膫鞲须娮悠骷墒固綔y器在溫度變化時測量更為準(zhǔn)確）。

	寬動態(tài)范圍（具有內(nèi)置衰減器）的 OD3 衰減技術(shù)將我們探測器的校準(zhǔn)光學(xué)動態(tài)范圍擴展了三個數(shù)量級。我們的衰減器設(shè)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(guān)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。

的校準(zhǔn)不確定性 918D 系列包括一個采用 NIST 可追溯標(biāo)準(zhǔn)，利用 Newport 光學(xué)探頭校準(zhǔn)設(shè)施維護的高精度設(shè)備完成的全光譜響應(yīng)校準(zhǔn)。嚴(yán)格的校準(zhǔn)設(shè)備和過程控制可實現(xiàn)業(yè)內(nèi)的校準(zhǔn)不確定性。每個探頭都附有校準(zhǔn)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(zhǔn)證書以及衰減器模式和無衰減器模式下的實際校準(zhǔn)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(zhǔn)。
		Detector calibration system block diagram.

	Internal Temperature Sensor The internal temperature sensor on the detector head is used to compensate the responsivity drift caused by the temperature change in the photodiode. The responsivity change is most sensitive around the bandgap, or towards the longer wavelength limit. The power meter calculates the temperature and automatically updates the responsivity value so that the measurements remain accurate. This feature is enabled with the power meter models 1936-R, 2936-R, 1919-R, and 841-PE-USB.

Photodiode Sensor Physics

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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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