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Yokogawa Releases AQ6377 Optical Spectrum Analyzer

Yokogawa Test & Measurement Corporation has recently announced that it has developed the AQ6377 optical spectrum analyzer.

YOKOThe AQ6377 is a benchtop analyzer that employs the dispersive spectroscopy technique to measure the optical spectra of laser light in the 1.9–5.5 μm wavelength range with high accuracy, wide dynamic range, and high resolution.

The support of measurements in the 5-μm band is an industry first for instruments of this type.

An optical spectrum analyzer is a measuring instrument that resolves the wavelength components of photonics devices such as semiconductor lasers and fiber lasers to evaluate their wavelength characteristics. The AQ6377 will be used to enhance optical devices in the 5-μm band and accelerate their use in environmental measurement and other fields.

Development Background

Recently, laser absorption spectroscopy*3 has entered wide use in the environmental measurement field for the detection of gases such as carbon oxides (COx), nitrogen oxides (NOx), and hydrocarbons (CxHy). Although near-infrared semiconductor lasers have been used as the optical source in such applications, there is an increasing need for mid-infrared lasers because these gases absorb more light at longer wavelengths.

The wavelength range around 5 μm is ideal for such measurements, and devices such as interferometer-type measurement instruments and large-scale measurement systems with spectrometers are available that use 5-μm semiconductor lasers to measure optical spectra in this range; however, these have disadvantages such as narrow dynamic range and low wavelength resolution that negatively impact measurement accuracy. There is thus a strong demand for compact, high-performance optical spectrum analyzers.

Since entering the optical spectrum analyzer market in 1980, Yokogawa has continued to develop and refine its technologies for the precision measurement of optical spectra in the visible and near-infrared ranges. Based on its expertise in dispersive spectroscopy, Yokogawa has developed the AQ6377 for mid-infrared measurements, including the 5-μm band.

Product Features

  1. Industry-leading measuring range: The AQ6377 features a dynamic range of 73 dB and a close-in dynamic range*4 of 50 dB, which are 2,000 times and 10 times greater, respectively, than the dynamic ranges of interferometer-type instruments operating in the 5-μm band. No other instrument on the market offers such high performance*5, which enables the evaluation of the side mode characteristics of semiconductor lasers.
  2. Industry’s highest wavelength resolution: The wavelength resolution of the AQ6377 is an industry-leading 200 pm, which is three times that of interferometer-type instruments operating in the 5-μm band.
  3. Accurate measurement of optical spectra: The AQ6377 comes with two additional functions. The first is a function that removes water vapor, which absorbs light at certain wavelengths, from the spectrometer. The second is a function that eliminates artifacts from higher-order diffracted light, a phenomenon intrinsic to all spectrometers in which wavelengths two to three times longer than those of incident light are generated.

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Nitisha Dubey

I am a Journalist with a post graduate degree in Journalism & Mass Communication. I love reading non-fiction books, exploring different destinations and varieties of cuisines. Biographies and historical movies are few favourites.

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