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Products / Light Analysis /Spectrometers /FT Infrared Spectrometer(900-16000nm) /FT-MIR spectrometer(2000-16000nm) /

FT-MIR spectrometer(2000-16000nm)

Overview Specifications Software Q&A Related Products Order Now！

SIMTRUM'S FT-MIR spectrometer is a highly peformant, compact and reliable spectrometer that is ideal for various applications in the mid-infrared. The concentration levels of CO2 or H2O in the interferometer volume are conveniently minimized thanks to a homemade, replaceable dessicant capsule. Thanks to its permanently aligned interferometer and solid-state reference laser, the FT-MIR spectrometer offers excellent stability in both intensity and wavelength scales.

The FT-MIR can accommodate various detectors, each displaying specific characteristics. Besides pryoelectric detectors (DLATGS), we offer a selection of thermoelectrically cooled (TEC) MCT detectors that enable achieving unprecented performances while keeping the instrument extremely compact. The FT-MIR can also be mounted with a liquid nitrogen (LN2) cooled MCT detector for demanding applications that require high signal-to-noise ratio (SNR) or specific setups with very low optical throughput. In its standard configuration, the FT-MIR can reach a resolution of 2cm-1 while our high resolution modules (available on request) can deliver up to 0.5cm-1.

FT-MIR spectrometer（2-12um

FT-MIR spectrometer（2-16um）with LN2 cooled MCT detector

Features

Compact
Adjustable spectral range
Dynamically adjustable resolution
Long lifetime
Removable fiber adapter
Low power consumption
USB 2.0 connection

Application

Mid-IR Optical Spectrum Analyzer
Liquid, thin-film or gas measurement
Material identification and quantification

Principle

Permanentely aligned interferometer

The heart of the FT-Rocket is dual corner-cube (retro-reflector) interferometer. The two corner-cubes are fixed to a common swinging arm, which rotates to create an optical path difference (with respect to the beam splitter) in the two arms of the interferometer.

This type of design is called a permanently aligned interferometer. This particular arrangement of the interfeormeter is known to be the most robust against vibrations and temperature drifts. It never has to be realigned. The swinging arm of the interferometer rotates on wear-free flexure system, making this mechanical system extremely robust and durable.

Solid-state reference laser

For measuring the movement of the mirrors, a solid-state reference laser is coupled into the interferometer. Compared to classic HeNe lasers, the solid-state lasers that we use are more compact and have a much longer life-time. They have a very low temperature-induced wavelegnth drift and, when kept at constant temperature with a Peltier element, their wavelength can be stabilized to a few PPM, thus providing a very accurate and reproducible wavelength scale. This is crucial for ensuring a day-to-day and unit-to-unit consistency.

General Parameters

Model	LA-AR01-FTMIR-060-4TE	LA-AR01-FTMIR-085-4TE	LA-AR01-FTMIR-120-4TE	LA-AR01-FTMIR-160-LN2	LA-AR01-FTMIR-160-DLA
Beam-splitter material	CaF2		ZnSe
Spectral Range [cm-1]	5000-1660	6600-1200	5000-830	5000-650
Spectral Range [μm]	2-6	1.5-8.5	2-12	2-16
Detector Type	MCT (4-TE cooled)			MCT(LN2 cooled)	DLATGS
*Detector Peak D[cm Hz1/2 W-1 ]**	＞1×10^11	＞8×10^9	＞4×10^9	＞5×10^10	＞2.5×10^8

Signal-to-noise ratio	＞80000:1	＞40000:1	＞40000:1	＞70000:1	＞8000:1
Removable fiber-optic coupler	Lensed (CaF2 fiber coupler)		Reflective fiber coupler (90° off-axis parabolic mirror)
Recommended fiber	IFG(1-6μm)	IFG(1-6μm) orPIR(3-18μm)	PIR (polycrystalline) fibers, 3-18μm

Internal reference laser	Temperature-stabilized solid-state laser @850nm
Resolution(unapodized) [cm-1]	0.5,2,4,8(user selectable)
Wavenumber repeatability	＜10 PPM
Scan frequency	＞4 Hz @ 4cm-1				＞0.4 Hz @ 4cm-1
Power requirement	12V / 10W max			12V / 6W max

Other Parameters

Fibered interface	Fiber core up to ∅ 900μm, NA=0.3, SMA 905 connector
Free-space interface	∅ 12.7mm collimated (max ~30mrad half angle)
Interferometer type	Permanently aligned, double retro-reflector design
A/D Converter	24 bit
Amplifier	4 gain levels low noise trans-impedance amplifier
Operating temperature	10℃-40℃
Communication Interface	USB 2.0
Software Interface	Windows 7/10/11 API for controlling the instrument via our DLL
Dimensions	180mm×160mm×80mm (Without Dewar)
Weight	1800g (Without Dewar)

We fully appreciate and value the multiple benefits that a dedicated, performant and reliable software can bring to your application. Automatic data collection, parameters changes, status diagnosis and many other essential tasks should be implemented as simply and as efficiently as possible in order to get the most out of your spectrometer. This philosophy led to the development of a multi-threading, cross-platform and versatile software application, the digital acquisition system or AoDAQ.

The AoDAQ simultaneously takes care of:

1. Handling communication with the FT-IR via USB

2. Processing raw signals to deliver a spectrum

3. Running a TCP Ethernet server

The AoDAQ can be installed on all sorts of computers, from desktop machines to embedded, low-power single board computers. Thanks to the hosting of a TCP server, the instrument data and parameters can be accessed locally and/or remotely. All communication with the instrument eventually reduces to a set of TCP/IP commands that allow to quickly acquire data, adjust parameters, monitor the instrument status etc. using the programming environment of your choice.

What is the equivalent wavelength resolution of my FT-IR ?

Owing to its operating principle, a FT-IR delivers a spectrum uniformly sampled over a given spectral range in wavenumbers (ν), with units of cm^-1. The wavenumber is simply defined as the inverse of the wavelength (λ). The resolution of an FT-IR is constant in wavenumber (Δν), but varies with wavelength (Δ λ) due to the inverse relationship between these two units. The conversion betwen wavenumber resolution and wavelength resolution is Δλ=λ₂ · Δν and is shown in the graph below:

Resolution in [nm] as a function of wavelength in FT-IR systems

How to choose the best detector for my application ?

The choice of a detector is a most sensitive one as it contributes to a large extent to the overall quality of your measurement. We offers several types and models of detectors, namely extended InGaAs detectors (2 stage thermo-electric cooling), HgCdTe (MCT) detectors with either thermoelectric cooling (4 stages) or liquid nitrogen cooling as well as pyroelectric (DLATGS) detectors. Selection of a given detector is application driven, and depends on the spectral signatures that you are willing to analyze. In order to deliver a faire comparison between various types of photodetectors (or thermal detectors), the most widespread metric is the specific detectivity (labelled D*), which is given in the figure below for all of our available detectors.

Specific detectivity (D*)

What configuration should I select for my application?

We offers two distinct classes of spectrometers: FTIRs without a built-in light source, such as the LA-AR01-FTMIR-120, and FTIRs which integrate a built-in emitter, such as the LA-AR01-FTMIR-FC-120. Source-free instruments can be used to characterize both samples (relative measurements) and optical sources (absolute measurements). FTIR with built-in sources can only be used to perform relative measurements, as light is modulated by the interferometer before being output. This configuration has the advantage of being robust to signal modification induced by stray-light or background thermal radiation.


Light routing in the LA-AR01-FTMIR-120 (up) and the LA-AR01-FTMIR-FC-120 (down)

Related products

Model	Wavelength Range	Resolution	Detector
FT-NIR spectrometer	900-2500 nm	2/4/8 cm-1(user selectable)	Extended type InGaAs PIN photodiode, 2TE cooled
FT-MIR spectrometer	200-16000 nm	0.5/2/4/8cm-1(user selectable)	MCT (4-TE cooled) MCT (LN2 cooled) DLATGS


Fiber coupled FT-IR spectrometer	200-16000 nm	2/4/ 8cm-1 (user selectable)	InGaAs (2-TE cooled) MCT (4-TE cooled) MCT (LN2 cooled)


VIS-NIR-FIB spectrometer	350-2500 nm	<1.5 nm	silicon array detector (3648 pixels) 16-bit ADC.extended range InGaAs photodiode, 2TE cooled, 24-bit ADC.
VIS-NIR-DR spectrometer	360-2500 nm	5 nm	Extended range InGaAs detector

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LA-AR01-FTMIR-160-DLA - Parameter

LA-AR01-FTMIR-160-LN2 - Parameter

LA-AR01-FTMIR-120-4TE - Parameter

LA-AR01-FTMIR-085-4TE - Parameter

LA-AR01-FTMIR-060-4TE - Parameter

LA-AR01-FTMIR-160-DLA - Download

LA-AR01-FTMIR-160-LN2 - Download

LA-AR01-FTMIR-120-4TE - Download

LA-AR01-FTMIR-085-4TE - Download

LA-AR01-FTMIR-060-4TE - Download

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	Availability	Reference Price (USD)
LA-AR01-FTMIR-060-4TE Spectral Range：2-6μm，Detector Peak D*：＞1×10^11cm Hz^1/2 W^-1，Signal-to-noise ratio：＞80000:1,Resolution：0.5/2/4/8cm-1(user selectable)	4-6week	$27429.00
LA-AR01-FTMIR-085-4TE Spectral Range：1.5-8.5μm，Detector Peak D*：＞8×10^9cm Hz^1/2 W^-1，Signal-to-noise ratio：＞40000:1,Resolution：0.5/2/4/8cm-1(user selectable)	4-6week	$27429.00
LA-AR01-FTMIR-120-4TE Spectral Range：2-12μm，Detector Peak D*：＞4×10^9cm Hz^1/2 W^-1，Signal-to-noise ratio：＞40000:1,Resolution：0.5/2/4/8cm-1(user selectable)	4-6week	$27429.00
LA-AR01-FTMIR-160-LN2 Spectral Range：2-16μm，Detector Peak D*：＞5×10^10cm Hz^1/2 W^-1，Signal-to-noise ratio：＞70000:1,Resolution：0.5/2/4/8cm-1(user selectable)	4-6week	$28160.00
LA-AR01-FTMIR-160-DLA Spectral Range：2-16μm，Detector Peak D*：＞2.5×10^8cm Hz^1/2 W^-1，Signal-to-noise ratio：＞8000:1,Resolution：0.5/2/4/8cm-1(user selectable)	4-6week	$26880.00