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OPTICALMEASURINGINSTRUMENTS

OPTICAL TEST SET

GPIB

MT9810B

Multipurpose Optical Measuring Instruments Supporting Reference Light Sources

Today, as we turn to photonic communications, a variety of opticalcommunication networks, from core to access, are about to be real- ized. For this reason, there are a wide variety of performance re- quirements demanded of optical components and optical communi- cations systems making up these rapidly developing optical commu- nication networks. And the performance and specifications of the sought after evalua- tion systems vary depending on the field (development, manufactur- ing, inspection, maintenance) in which these are developed, sup- plied and implemented. The MT9810B Optical Test Set is the most fundamental optical mea- surement instrument with a complete line-up of light sources (DFB- LD, FP-LD, SLD) and optical sensors (high-speed, general-purpose, high-power). The evaluation system can be configured to fit the users needs. In addition, by combining the optical test set with peripheral devices such as the optical directional coupler and the optical channel se-lector, the user can construct even more diverse evaluation systems.The MT9810B is a highly accurate and reliable evaluation system that will respond with flexibility to future diverse measurement needs.

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Recording measured optical power values By mounting an optical sensor, a maximum of 1000 power measure- ment values can be saved per channel. The saved measurement val- ues can be read by remote control, permitting various analyses and processings.

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Variable optical power measurement interval By mounting an optical sensor, the optimum measurement interval can be set according to the applications (1 ms to 99 h 59 min 59 s); for example, a long interval for a long-duration measurement, and a short interval for high-speed measurement.

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Variable optical power measurement bandwidth By mounting an optical sensor, the bandwidth can be set according to the measured item; for example, the average pulse optical power can be measured by widening the bandwidth, and the variations in optical power at an optical switch can be measured by narrowing the bandwidth. The setting range is between 0.1 Hz to 100 kHz (MU931311A) or 10 kHz (MU931421A/931422A).

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Relative measurement By mounting an optical sensor, 0 dB is displayed as the measured value on the display when the relative key (Rel) is pressed. It allows the difference from the reference value to be read directly in the loss measurement of an optical fiber or device.

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Light source The DFB-LD complies with ITU-T recommended wavelengths and highly stable 1.31 µm band, 1.55 µm band FP-LD’s are also offered. In addition, an SLD light source with a center wavelength of 1.55 µm and an approximately 40 nm wavelength band is provided.

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Reference measurement By mounting an optical sensor, a relative value based on a reference value (reference) entered using the keys can be displayed. When the light is incident at a distant location in the loss measurement of an optical fiber, the fiber loss can be read directly by entering the refer- ence value of incident light as a reference.

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Optical sensors There are three optical sensors: high-sensitivity, general-purpose and high-power. Each has sensor head and plug-in models.

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Measurement conditions saving function Up to 10 sets of measurement conditions can be saved for each channel, permitting the repetition of measurements.

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Controlling optical channel selector The MN96xxA Optical Channel Selector can be controlled from the MT9810B Optical Test Set by connecting the two via a dedicated ca- ble. It facilitates the measurement if the optical test set and the opti- cal channel selector are at a distance from each other due to the configuration of the measurement system. The cable lengths are available in the range from 1 to 10 m.

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Clone function When the same types of units are mounted in Channels 1 and 2, the measurement conditions for one side can be copied onto the other side.

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Measurement of max., min. and variation of optical power GPIB and RS-232C I/F as standard By mounting an optical sensor, the maximum and minimum values of optical power and the variations in its value can be always displayed, eliminating the need for saving the measured optical power various in the memory. Light source stability and PDL (polarization depen- dent loss) characteristics can be evaluated in real time.

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GPIB and RS-232C interfaces are provided as standard, permitting remote control of the measurements via a PC. http://www.anritsu.com 44