The Integrated Tap Photodiode Array (TPDA) is a compact, multi-channel power-detecting device. It obviously simplifys module design and assembling process by pre-integrating several single power detectors in one. It provides standard pins with 2.54 mm space to easily mount on PCB. It can be applied for channel power monitoring in DWDM system, in-line optical network switching protection monitoring (OLP), re-configurable optical add/drop multiplexer(OADM), and gain/attenuation monitoring in network\'s power detection.