Patent ID: 6198859
Filing Date: 2001-03-06
Classification: G02B,H04B

Abstract:
A dispersion compensating device comprising:a three port optical circulator having an input port, an intermediate port, and an output port in which a signal light input from said input port is transmitted to said intermediate port and to said output port;a dispersion compensating fiber module having a first end combined with said intermediate port of said optical circulator for compensating dispersion of said signal light by propagating said input signal light therethrough; anda reflection means provided at a second end of said dispersion compensating fiber module for reflecting said signal light by means of a highly reflective surface thereof,wherein said highly reflective surface is totally internal to said dispersion compensating fiber module and includes a reflectance ratio of more than 99%, wherein said dispersion compensating fiber module is one-half a length corresponding to a necessary dispersion compensating quantity and has a dispersion amount which is in the range of -80 to -120 ps/nm/km for positive dispersion and +15 to +25 ps/nm/km for negative dispersion and has a loss factor of 0.8 dB/km.