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High Sensitivity Fast PIN Photodetector Series FPD510 The high sensitivity PIN Photo Detector FPD510 is optimized for highest signal-to-noise ratio when detecting low level optical beat signals at frequencies up to 250 MHz. The unit is recommended in particular for applications in metrology when beat signals of weak power have to be detected in a highly efficient way. Models for both the visible and the near infrared regime are available. Features Applications •High signal-to-noise ratio•Flat spectral response (less than 3dB up to 200 MHz)•OEM package with FC/APC pigtail (SMF28) or free space module•Available for visible and near infrared spectral range •Efficient detection of optical beat signals at frequencies up to 250 MHz•Detection of fiber coupled or freespace low light level signals•OEM integration

FPD510: Pulse response of a femtosecond pulse train at 1560 nm Time Characteristics Time Characteristics Frequency CharacteristicsExample Application: Offset Beat of Self-referenced Frequency Comb

Input Signal:250 fs Pulses @ 1560 nmaverage power 1.25 microW Input Signal:250 fs Pulses @ 1560 nmaverage power 1.25 microW

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Signal [V] Signal [V] 00.10.20.30.4 -0.100.10.20.30.4 0102030405060708090 02468101214

Time [ns] Time [ns]

Signal [dBm] Signal [dBm] -80-70-60 -50-40-30 -20 -80-60 -40-200 050100150200250 020406080100

Frequency [MHz] Frequency [MHz]