OSA: Measurement of Temporal Change of Optical Power
● Yokogawa's optical spectrum analyzer is equipped with a "0 nm sweep function" that repeatedly measures the optical power of a specific wavelength and displays the change over time. It is also effective for aligning the opticalaxis, such as coupling an optical fiber to the light source.
■ 0 nm Sweep function
When the wavelength span setting of the optical spectrum analyzer is set to 0 nm, the spectroscopic element (diffraction grating) is fixed at the center wavelength position. If you perform measurement (sweep) in this state, the change over time in the optical power at the center wavelength can be observed. The horizontal axis of the screen is changed to time. (Usually, wavelength) Before executing the 0 nm sweep, set the center wavelength to the measuring wavelength and the wavelength resolution to the maximum resolution (2 nm). This is to avoid missing the optical power due to changes in wavelength over time. Since the measurement (sweep) time can be set arbitrarily in [0nm SWEEP TIME]**, slow power changes can be displayed on one screen
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2020/6/3 |
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R0 |
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KSR-0978-AF053 |
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175 KB |
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