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Advantest > Q7607
Advantest Q7607 Optical Chirp Test Set
For Quick and Easy Measurement of Dynamic Chirp of 50 Gb/s Optical Modulators and Laser Sources As the range of optical transmission systems increases and capacity rises through higher bit rates and the application of wavelength division multiplying (WDM) technologies, measurement, evaluation, and control of the chirp generated by optical devices such as optical modulators is becoming increasingly vital for improving the quality of transmission. The ADVANTEST developed Q7607 optical chirp test set enables easy measurement of dynamic chirp from components such as optical modulators and laser diodes (LDs) in 30 seconds or less when used with a digital sampling oscilloscope and a PC. Features
FunctionsMeasurement principle :Using the conversion characteristics between optical frequency and intensity in the built-in optical-fiber-type Mach-Zehnder interferometer, the instrument converts the dynamic chirp (optical frequency modulation) into a change in optical power FM. By controlling the discrimination point of the interferometer, FM is either added to or subtracted from the intensity IM of the optical input signal. Polarization compensation : Automatic polarization compensation by the internal optical-fiber-type polarization controller Performance Specifications *1 Wavelength measurement range : Q7607 ; 1510 to 1610 nm Q7607+10 ; 1530 to 1610 nm Optical input power range : -10 to 10 dBm Frequency conversion accuracy : within ±15% FM demodulation coefficient (50 G/10 G) *2 : P×0.021/GHz / P×0.042/GHz Free Spectral Range (50 G/10 G) : 300 GHz ±15 GHz / 150 GHz ±15 GHz Demodulation band width (50 G/10 G) *3 : 100 Hz to 100 GHz / 100 Hz to 50 GHz Deviation of demodulation frequency (50 G/10 G) : 135 GHzpp or less / 65 GHzpp or less Insertion loss : Q7607 ; 13 dB or less Optical output power : Q7607+10 ; -3 to 0 dBm *4 Input light polarization compensation : Automatically controlled *1 At 23±5°C *2 P : optical average power *3 100 MHz as standard, 1 dB down *4 Total output of optical power Option List
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