fibre loss
4.The design theory and fabrication technique of the optical circulator with pris-matic polarizing beam splitter and its applications in the fibre communication and sensingsystems are presented in this ljaper The parameters of the optical circulator fabricatedhave been measured with an insertion loss less than 2.8dB,isolation ratio greater than 25dBand echo-wave loss greater than 40dB, The characteristics of the device are insensitive tothe polarication of the input light
5.Treatment with 1ml/kg ethanol could signifi cantly inhibit the respiratory rate, ethylene production and weight loss, decre a se the chlorophyll content increase the crude fibre and lignin contents and in hi bit decay incidence, thereby maintaining better quality and prolonging the st ora ge life.
