OSA: Removal of Absorption inside OSA by Purging
Applicable model*: AQ6380/AQ6374/AQ6375/AQ6376/AQ6377
When a light source with a wide wavelength band is measured with an optical spectrum analyzer (OSA), noisy waveforms may appear in certain wavelength bands and interfere with measurement. This is due to light absorption of water vapor (H2O) or carbon dioxide (CO2) contained in the air inside the OSA optics (monochromator). Water vapor has strong optical absorption near 1400 nm, 1900 nm and 2700 nm, and carbon dioxide has near 2000 nm and 4200 nm.
The applicable models are equipped with a purging mechanism to address this issue. By continuously supplying and exhausting purge gas such as dry air and nitrogen from the supply and exhaust port on the rear panel to the inside of the monochromator, the water vapor and carbon dioxide inside the OSA are removed, and the correct optical spectrum can be measured.
Purging gas ports
(IN/OUT)
|
Major requirements for purging nSupply tubing
1/4” outer diameter quick connectors, clean flexible nylon tubing nMaximum rating
Pressure: 1.5 psig (0.01 MPaG) nPurge gas
Ultra-high purity liquid nitrogen which must be 99.9999% pure grade with the heat exchanger is recommended. |
* All versions unless otherwise specified.
For AQ6375, AQ6375B or later.
No purging
Nitrogen purging (1 hr.)
Replacement efficiency of purging
Related Industries
Related Products & Solutions
AQ6370E Telecom 600 - 1700 nm
- AQ6370E Optical Spectrum Analyzer
- Popular TELECOM wavelength Range of 600nm to1700nm
- Ideal model for Telecommunications applications for single-mode and multi-mode optics
AQ6374 Wide Range Optical Spectrum Analyzer 350 – 1750 nm
- AQ6374 Wide Range Optical Spectrum Analyzer
- Covers wavelengths from 350 to 1750 nm
- Visible lights (380 to 780 nm) and telecommunication wavelengths
AQ6374E Wide Wavelength Range 350 - 1750 nm
- Wide range optical spectrum analyzer covering from visible light to communications wavelength
- Wide wavelength range: 350 to 1750 nm
- Ideal for various applications including fiber
AQ6375B Long Wavelength Optical Spectrum Analyzer 1200 - 2400 nm
High Performance LONG WAVELENGTH
The AQ6375B is a bench-top optical spectrum analyzer covering the long wavelengths, 1200 to 2400 nm, with the added benefits of gas purging input ports / output ports, a built-in cut filter for high order diffracted light, and a novel double speed mode which increases the sweep speed up to 2 times compared to the standard sweep mode.
AQ6375E Long Wavelength 1200 to 2400 nm and 1000 to 2500 nm
High Performance LONG WAVELENGTH
The AQ6375E covers not only telecommunication wavelengths, but also the SWIR region which is often used for environmental sensing and medical applications.
・Lineup of 3 models [Standard, Extended and Limited]
・Covers wavelengths
1200 to 2400 nm [Standard, and Limited]
1000 to 2500 nm [Extended ]
AQ6376 Three Micron Optical Spectrum Analyzer 1500 - 3400 nm
MWIR WAVELENGTH with internal gas purge and cut filter
The AQ6376 is the latest version of our bench-top optical spectrum analyzer extending the wavelength coverage well beyond the NIR range of our previous models into the MWIR region from 1500 to 3400 nm.
Popular applications include the detection of gases such as carbon oxides (COx), nitrogen oxides (NOx), and hydrocarbon gas (CxHy) for environmental studies.
AQ6376E Three Micron 1500 - 3400 nm
MWIR WAVELENGTH with internal gas purge and cut filter
The AQ6376E is the latest version of our bench-top optical spectrum analyzer extending the wavelength coverage well beyond the NIR range of our previous models into the MWIR region from 1500 to 3400 nm.
Popular applications include the detection of gases such as carbon oxides (COx), nitrogen oxides (NOx), and hydrocarbon gas (CxHy) for environmental studies.
AQ6377 Five Micron 1900 - 5500 nm
- AQ6377 long-wavelength optical spectrum analyzer model covering the MWIR region over 5 μm
- AQ6370D optical analyzer model with highest resolution (up to 20 pm)
- Highest close-in dynamic (up to 78 dB)
- Widest measurement power (up to 110 dB)
AQ6380 Highest Performance 1200 - 1650 nm and 900 - 1650 nm
AQ6380 OSA: 5 pm (0.624 GHz) high wavelength resolution, ±5 pm accuracy, 65 dB wide close-in dynamic range, 80 dB high stray light suppression
Optical Spectrum Analyzers
Measures the power intensity of light across different wavelengths in the electromagnetic spectrum.
Optical Test Equipment
- Yokogawa Test&Measurement optical test equipment solutions to measure optical components/systems
- Serves demand for high capacity fiber lines and new component technologies