Wavelength Conversion Module
Wavelength Conversion Module
Wavelength Conversion Module Upconversion

Wavelength Conversion Module

Accepted Wavelengths

2.0 µm - 5.3 µm

Output Wavelengths

695 nm - 886 nm

Output Spectral Resolution

2.5 cm-1

Optical Input/Output

Fiber connector

Wavelength Conversion Module: Converting Mid-infrared Wavelengths to the Near-Visible

The wavelength conversion module is the core of the NLIR technology. It upconverts mid-infrared light to near-visible wavelengths, enabling the use of Si and GaAs detectors.

Accepted wavelengths are in the bandwidth 2.0 – 5.3 µm, and they are upconverted to the bandwidth 695 – 886 nm by a 1064 nm high-power laser inside a LiNbO3 crystal. Only the vertical polarization is upconverted, which may reduce the amount of converted signal. However, it also reduces the converted noise by half. To cut away residual noise after upconversion, spectral filtering is applied  below 695 nm and above 886 nm.

For a wide bandwidth of 2.0 – 5.3 µm, the conversion efficiency is approx. 0.001, which for many applications, together with an appropriate near-visible light detector, still outperforms a standard MIR detector alternative in terms of noise-equivalent power. If a narrower bandwidth is desired, for example 3.3 – 5.0 µm, the conversion efficiency is > 0.01, and for a bandwidth of only 50 nm around 3.0 µm the conversion efficiency is > 0.1.

The translation to near-visible wavelengths gives further advantages than lower noise-equivalent power. Higher detection speed than conventional MIR detectors is readily available by just plugging the output fiber into a GHz GaAs detector; 10 GHz or even 25 GHz detectors are available off-the-shelf. Even further, standard near-visible light detectors often come pre-amplified with a response of up to GV/W, which eases the measurement of the electrical output.

The NLIR wavelength conversion module is an extremely versatile tool for any mid-infrared laboratory. Flexibility in mid-infrared measurement equipment is often desirable but expensive to buy. The wavelength conversion model works with many affordable detectors and spectrometers. In many different cases, it performs better than more expensive, conventional mid-infrared detectors.

The spectral resolution of the upconverted light is approx. 2.5 cm-1. If your application requires better resolution, please do not hesitate to contact us!

Wavelength Conversion Module: Converting Mid-infrared Wavelengths to Near-Visible

The wavelength conversion module upconverts mid-infrared wavelengths to near-visible, which enables the use of Si and GaAs detectors.

The 1064 nm high power laser (inside of a LiNb03 crystal) converts the wavelength. Accepted wavelengths are in the bandwidth 2.0 – 5.3 µm. Only the vertical polarization is upconverted, which may reduce the amount of converted signal. However, it also reduces the converted noise by half. To trim additional extra noise, filter below 695 nm and above 886 nm.

In terms of noise-equivalent power, the wavelength conversion module’s efficiency measurement of approximately 0.001 outperforms many MIR detectors. For a narrower bandwidth (3.3 – 5.0 µm for example), the conversion efficiency is > 0.01. For a bandwidth of only 50 nm around 3.0 µm, the conversion efficiency is > 0.1.

Near visible wavelengths can have advantages over lower, noise-equivalent power. By just plugging the output fiber into a GHz GaAs detector, you’ll have immediate access to higher-than-average detection speed. 10 GHz or even 25 GHz detectors are available off-the-shelf. Even further, standard near-visible light detectors often come pre-amplified with a response of up to GV/W, which eases the electrical output measurement.

The NLIR wavelength conversion module is an extremely versatile tool for any mid-infrared laboratory. Flexibility in mid-infrared measurement equipment is often desirable but expensive to buy. The wavelength conversion model works with many affordable detectors and spectrometers. In many different cases, it performs better than more expensive, conventional mid-infrared detectors.

The spectral resolution of the upconverted light is approx. 2.5 cm-1.

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1

Accepted Wavelength: 2.0 µm – 5.3 µm

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Output Spectral Resolution: 2.5 cm-1

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Output Wavelengths: 695 nm – 886 nm

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Optical Input/Output: Fiber connector