Balanced / auto-balanced IR detection moduleNIPM-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.

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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 (T_a = 20°C, V_b = 0 V)

Parameter	Typical value
Optical parameters
Cut-on wavelength λ_cut-on (10%) µm	2.9±1.0
Peak wavelength λ_peak, µm	4.2±0.5
Optimal wavelength λ_opt, µm	5.0
Cut-off wavelength λ_cut-off (10%) µm	5.5±0.3
*Detectivity D (λ_opt, REF), cm⋅Hz^1/2/W**	≥1.0×10¹⁰
*Detectivity D (λ_opt, SIG), cm⋅Hz^1/2/W**	≥1.0×10¹⁰
Output noise density v_n (100 kHz, R_Load = 50 Ω, REF), nV/Hz^1/2	≤100
Output noise density v_n (100 kHz, R_Load = 50 Ω, SIG), nV/Hz^1/2	≤100
Electrical parameters
Voltage responsivity R_v (λ_opt, REF), V/W	≥1.0×10⁴
Voltage responsivity R_v (λ_opt, SIG), V/W	≥1.0×10⁴
Low cut-off frequency f_lo, Hz	DC
High cut-off frequency f_hi, MHz	≥1.8
Output impedance R_out (REF, SIG, BAL/A-BAL), Ω	50
Output voltage swing V_out (R_Load = 50 Ω), V	0.4
Output voltage offset V_off, mV_DC	±30
CMRR balance / reference (100 kHz), dB	≤-32
CMRR auto-balance / reference (100 kHz), dB	≤-22
Power supply voltage V_sup, V_DC	+9
Power supply current I_sup, A	1.5
Other information
Active element material (REF and SIG)	epitaxial HgCdTe heterostructure
Optical area A_O (REF and SIG), mm×mm	1×1
Window (REF and SIG)	wAl₂O₃
Acceptance angle Φ (REF and SIG)	~36°
Ambient operating temperature T_a, °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)