DSR600 Photodetector Spectral Response Measurement System

Large Spectral Range (200-2400nm optional)

Large spectral range means that it is suitable for a variety of different samples, such as deep-ultraviolet detectors responding to the solar blind zone, solar cells, the near-infrared fiber sensors, and so on. All of them can be measured on the DSR600.

Turnkey Design, Simple Maintenance

The system uses substitution method of measuring principle, which is designed into Turnkey mode. Users do not need to debug the system before experiments. Routine maintenance is also very simple. The substitution method has been adopted as the spectral responsivity measurement standard method by the National Measurement Unit. Compared with the conventional detection methods, the substitution method is simple and has high accuracy for the system, avoiding systematic errors. For the substitution method detector system, the user just need to calibrate the Standard detector regularly. But for the conventional detector system, all of the parts of the system need to be calibrated, including the light source, monochromator, all of the optical component, that means the user have to split the system.

Monitoring CCD

The monitoring CCD is used for observing the probe light spot and positioning the sample accurately.

Total Reflection Optical Path

Total reflection optical path without aberration makes the measurement result more accurate.

Different photodetectors have different spectrum response range, so wide spectral range is very important for the detector responsivity measurement system to measure different photodetectors. The system designed in perfect reflection optical has better beam quality and spot uniformity than the system with transmission optical design.

In the transmission optical system, one of the important factors that determine the beam quality and spot uniformity is chromatism which originates in different wavelengths of monochromatic light having different refractivity for the optical material. And the wider spectral range , the more obvious the chromatism is. But in the perfect reflection optical system, it is not base on the refraction, there is no chromatism problem. So in the perfect reflection optical system, you can get the quality parallel spot or much small convergency spot .

Applicable Photodetector Types:

■ Photovoltaic detectors: A device made of the photovoltaic effect, such as solar cells, field effect

transistors, position sensitive detectors, array optoelectronic devices, and so on.

■ Photoconductive detectors: A device made of the photoconductive effect of semiconductor materials.

Light Source Instruction

EQ light source

Features：

■ Wide Spectral Range: 190-2100nm

■ 100 m luminous point

■ High UV output intensity

■ 9000h long lifetime

■ Small size, light weight, and good heat dissipation

Xenon lamp

Features：

■ Wide Spectral Range: 250-2000nm

■ 1 mm luminous point

■ High output light power

■ Simple bulb replacement and low  usage cost

Dual light source

Features：

■ Spectral range: 250-2500nm

■ Suitable for full spectral range from UV to NIR with smooth curve

■ Simple bulb replacement and low usage cost

Black body light source

Features：

■ Temperature range: 300-1500℃

■ Output aperture: 38 mm or 58mm

■ Stability: 0.3 K

■ Resolution: 0.1 K

High stability light source, reducing the background noise.

Though the modulation method could reduce the impact of stray light and the background noise on the measurement, the fluctuation of light source is still impossible to eliminate. So in the system designed in modulation, the stability of light source is the main source for system noise. Adopt the high stability light source to keep the system high repeatability. The stability data for light source relative intensity.

Sample Chamber
Feature:

■ Monitoring CCD make sample installation simple

■ Probe test stage

■ Optional vacuum adsorption sample stage

■ High-precision probe with triaxial cable to reduce the external interference

■ Total reflection optical path, the spot size and position keep same when the wavelength changes

QE-IPCE Software

■ Automatic save the testing data

■ Save sample type information

■ Support txt, Excel format export

■ Save multi test plans

■ Automatically finish bias voltage test

■ Fast choose and display measured data

DCS540 Optical Choppe

Features

■ Frequency Range: 20Hz-5kHz

■ 2.4 inch LCD display

■ Standard TTL/COMS level input & output

■ Single Photoelectric encoder operating knob

■ 0.01Hz resolution

High Precision Digital Source Meter

Features

■ Measure accuracy with 5½-digit resolution

■ I-Ranges: 1 A – 1 A

■ V-Ranges: 200 mV – 20 V

■ Interface: GPIB, RS232

■ Power: 20 W

■ >2000 Readings/Second

DCS500PA High Performance Digital Lock-in Amplifier

Features

■ 50mHz to 120kHz frequency range

■ Low-noise current and voltage inputs

■ 1nV to 1V full-scale sensitivity

■ Time constants extending from 10s to 30s

■ Up to 100dB dynamic reserve

Order Information

Model		DSR600-3111	DSR600-3121
Light Source		Xenon	Tungsten
Spectral Range		300-1700 nm	400-2400nm
Repeatability	200-400 nm	≥ 98%	-
	400-1000 nm	≥ 99%	≥ 99%
	1000-1700 nm	≥ 98%	≥ 98%
Data Acquaintance Unit		Lock-in	Lock-in
Spot		≤ 1 mm