Patent ID: 7110648
Filing Date: 2006-09-19
Classification: H04B

Abstract:
1. An analog optical transmission system comprising: an optical transmitter outputting optical signals modulated in accordance with electrical signals multiplexed on a frequency domain; a transmission line through which the modulated optical signals propagate, said transmission line having a whole length of 20 km or less and including a single mode fiber; an optical receiver receiving light that has propagated through said transmission line; a dispersion compensating fiber compensating for a chromatic dispersion of said transmission line, said dispersion compensating fiber satisfying one of a first condition that a chromatic dispersion is set at −250 ps/nm/km or less and a length is set at 1.1 km or less, and a second condition that the chromatic dispersion is set at −330 ps/nm/km or less and a length is set at 1.2 km or less; and an optical suppressing device suppressing light that propagates in a reverse direction to a propagating direction of the optical signal, said optical suppressing device arranged in a state adjacent to at least one of a light incidence end side and a light emission end side of said dispersion compensating fiber.