A novel external cavity laser with specific wavelength utilizing narrow-band-pass filter as wavelength selective component is presented. It consists of lensed fiber, semiconductor laser diode chip, collimating lens, narrow-band-pass filter, and high reflectivity planar reflector in series. Static characteristics of the laser are analyzed. All the calculations are based on the rate equation and the effective reflection coefficients of the compound cavity of the external cavity laser. Experimental result shows that the narrow-band-pass filter has the specifications with insertion loss about 0.5 dB, free spectral range more than 40 nm and -3 dB bandwidth less than 1.7 nm. Good single mode operation of the external cavity laser over wide injected current range is obtained with threshold current about 25 mA, side mode suppression ratio (SMSR) better than 40 dB. And the oscillation frequency of the laser can be emitted precisely according to the ITU-T wavelength nominal value. For the excellent performance of this laser, it can be really used as promising light source for Ethernet passive optical network (EPON) based wavelength division multiple access (WDMA).