The 2048 × 1 element InGaAs line detector is mainly composed of a low-noise readout circuit (ROIC), a P-I-N structure InGaAs photosensitive chip and a first-level thermoelectric cooler (TEC), and adopts a metal package. This user manual only describes the C type of this detector.
Name | Model | Description | Parameter | Price |
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● Two gear gains
● High line frequency
● High sensitivity
● Working at room temperature
Optical and electrical performance
Index name | Typical Value | |
Response spectrum range(μm)*1 | 0.95 ±0.05~1.7 ±0.05 | |
Pixel filling rate(%) | 100 | |
Peak quantum efficiency(%) | ≥65 | |
Peak detection rate (cm∙Hz/w) | ≥1×1012 | |
Peak sensitivity(A/W) | ≥0.8 | |
Effective pixel rate(%)*2 | ≥99 | |
Response non-uniformity(%) | <3 | |
Readout method | IWR 、ITR | |
Readout rate(MHz) | 1~11 | |
Maximum frame rate(fps) | 40k | |
Gain gear | 4 | |
Saturation voltage(V) | 2.0 | |
Integrating capacitance(fF) | Gain gear1: 10 Gain gear3: 100 | Gain gear2:20 Gain gear4:500 |
Notice:
* 1 Focal plane temperature = 25℃
*2 Near the half-well, the deviation of the pixel response signal from the average value is less than the percentage of pixels within a certain range
Response spectrum(TYP)
Schematic diagram of detector working principle and connection mode
Mechanical capacity
Index name | Typical Value |
Length × Width × Heigh(mm) | 51.3 ×28.2 ×9.8 |
Weight(g) | ~38 |
focal plane scale | 2048 × 1 |
Pixel center distance(μm) | 12.5 |
Pixel size(μm) | 12.5 × 12.5 |
Active area(mm) | 12.8×0.025 |
Mechanical Specifications
This detector adopts a metal package and is filled with high-purity nitrogen at normal pressure. The metal shell is made of FeNiCoSi alloy, and the surface is electroplated with Ni layer. The window welding method is In system brazing, and the cover type is resistance welding. The overall dimensions of the detector are 51.3mm (L) × 28.2mm (W) × 9.8mm (H). There are 38 pins on the shell leading from the bottom, of which 36 Φ0.45mm pins are arranged in a bilateral "one" shape with a pin spacing of 2.00mm. They are used for the input of focal plane power and instructions, focal plane detection signals and temperature sensors. Electrical lead-out; 2 Φ1.00mm wires are used for the connection of thermoelectric coolers. Four Φ2.5mm through holes are distributed on both sides of the tube shell for fixing the detector. The pin near the missing corner is No. 1.
The appearance and dimensions of the mechanical interface are shown in the figure below
Unit mm
Detector pin diagram
Detector pin description
Pin No. | Lead# | Pin function | Reference value |
1 | VDDA | Analog power supply | analog voltage 3.3V |
2 | SH3 | ||
3 | SH2 | Sampling control signal, setting pixel integration time, changing readout method, specific methods can be found in the timing section | Digital voltage High 3.3V/Low 0V |
4 | SH1 | ||
5 | RESET | Reset the signal, control the length of the acquisition cycle of the circuit, and refer to the timing section for the control method | Digital voltage High 3.3V/Low 0V |
6 | VOUT5S | ||
7 | VOUT5R | ||
8 | VOUT6S | ||
9 | VOUT6R | R is the reference signal, S is the output signal | |
10 | VOUT7S | Subtract the output signal from the reference signal of the same channel to obtain the actual detector response signal value | |
11 | VOUT7R | ||
12 | VOUT8S | ||
13 | VOUT8R | ||
14 | VBOUT | Buffer bias, providing bias voltage for circuit buffers | analog voltage 2.4V |
15 | VBOP | Amplifier bias, providing bias voltage for signal amplifiers | analog voltage 2.4V |
16 | VREF | Reference voltage, providing a reference value for the output signal | analog voltage 2.4V |
17/18 | TS | temperature sensor | |
19 | GND | GND | |
20 | VNDET | Chip public N | analog voltage 2.4V |
21 | VBUF | Buffer bias, providing bias voltage to the overall buffer of the circuit | analog voltage 2.4V |
22 | VOUT4R | ||
23 | VOUT4S | ||
24 | VOUT3R | Same as 6~ 13 | |
25 | VOUT3S | ||
26 | VOUT2R | ||
27 | CASE | ||
28 | VOUT2S | ||
29 | VOUT1R | Same as 6~ 13 | |
30 | VOUT1S | ||
31 |
DSELUNIT | Trigger the pulse, and the circuit begins to collect signals | Digital voltage High 3.3V/Low 0V |
32 |
DSELBUF | trigger pulse | Digital voltage High 3.3V/Low 0V |
33 |
CLK | Clock, providing a time reference for circuit driven timing | Digital voltage High 3.3V/Low 0V |
34 |
SELCAP0 | Detector gain selection, controlling the output signal size of the detector, specific methods can be found in the timing section | Digital voltage High 3.3V/Low 0V |
35 | SELCAP1 | Detector gain selection, controlling the output signal size of the detector, specific methods can be found in the timing section | Digital voltage |
36 | VDDD | Digital circuit power supply, providing voltage to the digital circuit inside the detector | analog voltage 3.3V |
37 | TEC (-) | The input voltage of the thermoelectric cooler is cooling when the TEC (+) pin is connected to a high level, and heating when connected to a low level | |
38 | TEC (+) |