Balanced / auto-balanced IR detection module

NIPM-I-5

2.9 – 5.5 µm and over 1.8 MHz, with two HgCdTe thermoelectrically cooled, optically immersed photovoltaic detectors

NIPM-I-5 is an infrared detection module designed for differential optical signal detection. The device can operate in balanced and auto-balanced mode. This detection module uses two individual detectors based on HgCdTe heterostructure. These IR detectors (signal and reference) are precisely matched to achieve a very high Common Mode Rejection Ratio (CMRR). NIPM-I-5 is dedicated to operating in systems where excess noise of radiation dominates, e.g. in the laser and some FTIR spectrometers.

See specification

Features

Two channels with similar spectral characteristics and frequencies

Manual change of balanced or auto-balanced mode

Low noise operation and high detectivity

Integrated with fans and thermoelectric cooler controllers

Single power supply

Compatible with optical accessories

Detectors type: PVI-4TE-5-1×1-TO8-wAl2O3-36

Applications

QCL lasers excess noise suppression in gas analysis

Specification (Ta = 20°C, Vb = 0 mV)

Parameter
Typical value
Optical parameters
Cut-on wavelength λcut-on (10%) µm
2.9±1.0
Peak wavelength λpeak, µm
4.2±0.5
Optimal wavelength λopt, µm
5.0
Cut-off wavelength λcut-off (10%) µm
5.5±0.3
Detectivity D*(λopt, REF), cm⋅Hz1/2/W
≥1.0×1010
Detectivity D*(λopt, SIG), cm⋅Hz1/2/W
≥1.0×1010
Output noise density vn(100 kHz, RLoad = 50 Ω, REF), nV/Hz1/2
≤100
Output noise density vn(100 kHz, RLoad = 50 Ω, SIG), nV/Hz1/2
≤100
Electrical parameters
Voltage responsivity Rvopt, REF), V/W
≥1.0×104
Voltage responsivity Rvopt, SIG), V/W
≥1.0×104
Low cut-off frequency flo, Hz
DC
High cut-off frequency fhi, MHz ≥1.8
Output impedance Rout (REF, SIG, BAL/A-BAL), Ω 50
Output voltage swing Vout (RLoad = 50 Ω), V 0.4
Output voltage offset Voff, mVDC
±30
CMRR balance / reference (100 kHz), dB
≤-32
CMRR auto-balance / reference (100 kHz), dB
≤-22
Power supply voltage Vsup, VDC
+9
Power supply current Isup, A
1.5
Other information
Active element material (REF and SIG)
epitaxial HgCdTe heterostructure
Optical area AO (REF and SIG), mm×mm
1×1
Window (REF and SIG)
wAl2O3
Acceptance angle Φ (REF and SIG)
~36°
Ambient operating temperature Ta, °C
5 to 25
Reference output socket (REF)
SMA
Signal output socket (SIG)
SMA
Balanced / auto-balanced output socket 
SMA
Power supply  socket
DC 2.1/5.5
Mounting hole
M6
Fan
yes (2 pcs)

Spectral response (Ta = 20°C, Vb = 0 mV)

Mechanical layout, mm

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Temperature sensor characteristics

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