SANTECH PEM320 消光比測試儀 POLARIZATION EXTINTION RATIO METER Description: The PEM-320 Polarization Extinction Ratio Meter provides accurate, real-time information about the polarization state of light in an optical fiber. It can be used as a general purpose measuring instrument but has been designed, in particular, to enable the accurate and rapid alignment of polarization maintaining fibers to optical components. The rotating polarizer design, coupled with a high sensitivity detector enable the PEM-320 to measure high linear polarization extinction ratios, of up to 40dB, with a 2.5Hz refresh rate. The PEM-320 simultaneously displays values for polarization extinction ratio (PER), optical power and polarization angle. These are the three critical parameters required for the alignment of polarization maintaining fiber to optical components. In addition, the PEM-320 has full support for GPIB and RS-232C communication interfaces together with an analogue data output. These features provide the unit with unrivalled flexibility for integration into automatic measurement and automatic fiber alignment systems. Specific Details: Item Unit Value Wavelength Range nm 1520 ~ 1600* (power calibrated at 1550nm) PER Range dB 0 ~ 30 (when input power >-30dBm) 0 ~ 40 (when input power >-20dBm) PER Resolution dB 0.1 (when PER < 30dB) 0.3 (when PER > 30dB) Power Measurement dBm -40 ~ +10*