Oriel Photodiode Detectors for Optical Power Meter

Product catalog summary

Introduction
This document provides detailed information on Oriel Photodiode Detectors used for Optical Power Meters, focusing on their specifications, operational modes, and ordering information.

Photodiode Detectors Overview
The OPM™ detectors are based on Si, InGaAs, and Ge photodiodes, operating in photovoltaic mode for optimal DC and low-frequency performance. Both room temperature and TE cooled models are available, with calibrated models for spectroradiometric measurements. The OPM Readout uses PROM stored calibration data for incident power calculations, supporting PC communications via RS-232 and IEEE-488.

Photovoltaic Operation
Photovoltaic mode is chosen for its low noise in DC and low-frequency operations, avoiding shot noise from bias currents.

Spectral Ranges
Fig. 1 illustrates the spectral responsivities of Si and InGaAs detectors. UV-enhanced Si detectors are suitable for wavelengths below 400 nm, while VIS-NIR Si detectors perform best between 400 nm and 1.0 µm. InGaAs detectors are used for wavelengths up to 1.7 µm, with Ge extending IR response by ~0.1 µm. TE cooled detectors offer improved stability and lower noise levels, with cooling affecting spectral responsivity, especially at longer wavelengths.

System Requirements
To build a complete system, the following components are needed: a room temperature or TE cooled detector, an OPM, and a 77055 TE Cooler Controller for TE cooled detectors.

Ordering Information
The document provides a detailed table listing various detector types, calibration status, wavelength ranges, active areas, temperatures, models, and prices. Options include both calibrated and non-calibrated models for Silicon, InGaAs, and Ge detectors.

Dimensional Diagram
Fig. 2 presents the dimensional diagram of the photodiode detectors, detailing measurements and design features.

Catalog excerpts

Oriel Photodiode Detectors for Optical Power Meter -1

1 MONOCHROMATORS AND SPECTROGRAPHS FT-IR SPECTROMETERS BENCHTOP SPECTROMETERS MINISPECTROMETERS SINGLE CHANNEL DETECTION SYSTEMS Phone: 1-800-714-5393 • Fax: 1-203-378-2457 S p e c t r o s c o p y I n s t r u m e n t s ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS Oriel Photodiode Detectors for Optical Power Meter Photodiode Detectors This family of OPM™ detectors presented here is based on Si, InGaAs, and Ge photodiodes operated in photovoltaic mode for best DC and low frequency performance. We offer both room temperature and TE cooled models. The calibrated models allow you to take spectroradiometric measurements over the useful detection ranges of these devices. The OPM Readout downloads the PROM stored calibration data and utilizes it to calculate the incident power for display and for PC communications (RS-232 and IEEE-488). The RMS mode of operation of the OPM allows you to measure AC signals up to the 100 kHz bandwidth limit. 0.8 0.6 0.4 0.2 0.0 200 400 600 800 1000 1200 1400 1600 1800 TYPICAL RESPONSIVITY (A/W) WAVELENGTH (nm) InGaAs COOLED TO 243K STANDARD SILICON UV-ENHANCED SILICON Fig. 1 Typical responsivities of Si and InGaAs Detectors Why Photovoltaic Operation? We have chosen to operate this family of photodiodes in a photovoltaic, unbiased mode. The photovoltaic mode of operation offers the lowest noise for DC and low frequency operation since it avoids the shot noise associated with bias currents. Spectral Ranges Fig. 1 shows the typical spectral responsivities of the very popular Si and InGaAs detectors. Choose the UV versions of Si detector if your work takes you below 400 nm. These Si detectors are sensitive down to 180 nm and offer calibrated performance down to 200 nm. The VIS-NIR version of Si detectors give you the best performance between 400 nm and 1.0 ìm and useful performance to 1.1 ìm. Use the InGaAs units for wavelengths up to the 1.7 ìm long wavelength cut off point. Ge extends the IR response, as compared to InGaAs, by ~0.1 ìm. We offer TE cooled detectors for improved stability of response and to allow you to reach lower noise level performance, especially for InGaAs and Ge. Cooling also has an effect on spectral responsivity, most significantly at longer wavelengths. The detector's cut-off wavelength shifts to slightly lower values as the temperature is lowered. It can change by about 0.1 ìm for InGaAs or Ge when going from room temperature to 243 K. What Else do I Need? These detectors include all necessary cables to connect to the Oriel OPM (Optical Power Meter). To build a complete system you simply need: Room temperature or TE Cooled Detector OPM (Optical Power Meter) 77055 TE Cooler Controller (if using a TE cooled detector) • Full-featured family of diode detectors • NIST traceable calibration • Linear response from pW to mW • UV to IR responsivity

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Oriel Photodiode Detectors for Optical Power Meter -2

S p e c t r o s c o p y I n s t r u m e n t s 2 Email: [email protected] • Web: newport.com MONOCHROMATORS AND SPECTROGRAPHS SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS FT-IR SPECTROMETERS ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS Ordering Information Detector Type Calibration Wavelength Range Detector Active Area Temperature Model Price Silicon Non-Calibrated 185 - 1100 nm 10 x 10 mm Room Temperture 71608 185 - 1100 nm 10 x 10 mm Room Temperture 71610 185 - 1100 nm 5 mm dia. TE Cooled 71612 400 - 1100 nm 10 x 10 mm Room Temperture 71609 400 - 1100 nm 5 mm dia. TE...

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