Fujitsu FIM24721 Series Application Note page 3

Structure of Micro ICR
Micro Integrated Coherent Receiver (ICR) FIM24721 / FIM24731 / FIM24723 /
FIM24733 series are configured with following functions, control pins, monitor
pins and power supply pins.
■ Functions
- Based on OIF projects
- Eight(8) photo-detectors, comprised of 4 sets of balanced detectors
- Four(4) linear amplifiers with differential outputs
- Two(2) ninety degree hybrid mixers with differential outputs
- A polarization splitter element,
separating the input signal into two orthogonal polarizations,
with each polarization delivered to a hybrid mixer
- A power splitter,
splitting the local oscillator power equally to the two hybrid mixers
- Automatic Gain Control (AGC) and Manual Gain Control (MGC)
- User settable independent output voltage swing adjustment
for each of the four outputs
- Peak indicators for each output
- DC blocker for each output
- All above is in one hermetically sealed package
- Variable optical attenuator (VOA)
- Input signal power monitor photodiode (MPD)
■ Control pins
- Gain control mode selection
- Gain adjustment in MGC mode
- Output voltage swing adjustment in AGC mode
- Output shutdown
■ Monitor pins
- Peak indicator for output
- Input signal power monitor
■ Power supply pins
- Photodiode power supply voltages
- Amplifier power supply voltages
FUJITSU OPTICAL COMPONENTS CONFIDENTIAL
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PS-15-349-01