A coarse wavelength-division multiplexing (CWDM) bidirectional transceiver was demonstrated by tuning transmission band of thin-film filter (TFF) based on the relation between tilted, rotated and ferrule angles of optical fiber. The packaging of the module was designed for keeping the transmission band with spectral bandwidth of 10nm by adjusting incident angle of the excited light to TFF. As a result, the fabricated module showed transmitter output power of 0.26dBm under the injection current of 30mA and receiver sensitivity of -22.5dBm at the error rate of 10^-12 under 2.5Gbps full duplex operation.