Indium Gallium Arsenide Detectors

Indium Gallium Arsenide Short Form Catalog in PDF Format Click on any drawing on this page to see enlarged version. (Must have Adobe Reader to view these PDF drawings.) Download free version of Adobe Reader here	Detectors
	Device Options
	Package Options
	Custom
	Key Features
	Applications
	Multiplexed Linear Arrays

J22 and J23 Series InGaAs Detectors

The J22 and J23 Series detectors are high performance InGaAs detectors operating over the spectral range from 0.8µm to 2.6µm.  These detectors provide fast rise time, uniformity of response, excellent sensitivity and long term reliability for a wide range of applications.  For enhanced performance or temperature stability of response near the cutoff wavelength, Judson offers a variety of thermoelectrically cooled detector options.

   Fig. 1

Device Options

Judson's standard InGaAs detectors, the J22 Series, offers high reliability and performance in the spectral range from 0.8µm to 1.7µm.  In addition, the J23 Series Extended InGaAs detectors are available in four cutoff options at 1.9µm, 2.2µm, 2.4µm and 2.6µm.  Figure 1 shows the typical response for the J22 and J23 Series at room temperature operation.

Click here to view typical specifications at 22°C

Package Options

The J22 and J23 Series are available in standard TO packages, ceramic sub-mounts and bare die.  We also offer different window materials, lenses or optical filter options.  Please refer to the drawings below for standard package options.

Standard Packages:  

Custom

For more demanding applications, Judson's team of engineers will provide custom design services.  Please contact us with your special requirements.

Optional Packages:

Key Features

• Stable response vs. temperature
• Wide dynamic range
• High linearity
• No bias or cooling required 

Applications

• Gas analysis
• NIR-FTIR
• Raman spectroscopy
• IR fluorescence
• Blood analysis
• Optical sorting
• Radiometry
• Chemical detection
• Optical communication
• Optical power monitoring
• Laser diode monitoring
• Laser burn-in

Parallel Output Arrays

Standard packaging and element configurations result in low cost and quick delivery for Judson's high-quality photodiode arrays.  The 16 and 32 element InGaAs arrays respond to infrared radiation from 700nm to 1.8µm. The photodiode arrays come mounted in a dual inline 40 pin package.

Judson's NIR arrays have a parallel output format with common substrate and one pinout for each element. This format allows for independent readings from each channel.

A separate transimpedance op-amp circuit is recommended for each channel. The Judson Model PA-7:16C and PA-7:32C preamps are convenient multi-channel modules with receptacles for the array package. Transimpedance gain is specified by the user.

Applications

• Clinical Analyzers
• Near-IR Spectroscopy
• Fibert Optics
• Currency Validation
   

Package

These arrays are mounted in the Judson "40P" package, a 40 pin, dual-in-line package with glass window.  Pins 1 and 21 are connected to the common substrate. Elements of the 16-element array are connected to pins 23-38. The 32-element array is mounted with odd-numbered elements connected to pins 3-18 and even-numbered elements connected to pins 23-38.  The gap between elements is 0.01mm.

J22M and J23M Multiplexed InGaAs Linear Arrays

The J22M Series are high performance InGaAs linear arrays designed for telecom applications in the S, C and L band.  The J23M Series are InGaAs linear arrays with extended NIR cutoffs at 1.9µm, 2.2µm, 2.4µm and 2.6µm for applications in spectroscopy and thermal imaging.

The J22M and J23M arrays are coupled to buffered CMOS multiplexers and are offered in sizes of 128 and 256 elements with 50µm channel spacing and 500µm pixel height.  The integrating amplifier maintains zero voltage bias across each InGaAs photodiode minimizing dark current and low frequency noise.  With high input impedance CMOS, charge coupled transimpedance amplifier and four computer selectable well capacitors, our MUX design offers low noise and a wide dynamic range.

Click here for Multiplexed InGaAs Selection Guide

Key Features

• Wide dynamic range
• Low noise
• Selectable well sizes
• Double correlating sampling
• Simple synchronous clocking DC to 1MHz

Applications

• Spectroscopy
• Thermal Imaging
• Sorting
• Medical
• DWDM

Click here for Electrical and Optical Characteristics of Muxed InGaAs

Click for more Muxed InGaAs information.

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