Patent ID: 6661947
Filing Date: 2003-12-09
Classification: H04B

Abstract:
An optical transmitting apparatus comprising:an optical transmitting means for multiplexing and amplifying first transmission light (&lgr;1L) and first pumping light (&lgr;2PL) to thereby amplify the first transmission light (&lgr;1L), and outputting an amplified optical signal to an internal optical fiber; a level monitoring means connected to said optical transmitting means for detecting a level of the optical signal outputted from said optical transmitting means; an optical multiplexing means connected to said internal optical fiber for transmitting an optical signal in said internal optical fiber to a first optical fiber connected to an external optical repeating apparatus, and also being operable to receive an optical signal having a predetermined wavelength in transmission light transmitted from said external optical repeating apparatus through said first optical fiber, and split the optical signal into a plurality of directions, and output split optical signal; and a loopback light detecting means connected to said optical multiplexing means for receiving an optical monitoring signal transmitted from said external optical repeating apparatus.