TH15839A - Low noise optical amplification unit with pumping power reflection. - Google Patents

Abstract

This invention is about fiber-active low-noise optical amplifiers. It consists of a laser emitter which is connected to optical telecommunication fiber and which receives light from that part at the transmission wavelength, which is also fed by active fiber (6). From light sources at pumping wavelength And the length corresponds to the length required To absorb a partial portion of the pumping light is directly fed into it. At the end of the stream Optical fiber (6), an optional glass element (8), is present, which reflects light at the pumping wave length and is optimally transparent to the transmitted wavelength. The glass fragment (8) consists of an optical multiplexer (9) which has been modified to separate the transmission wavelength and length. The pumping wave goes onto two output fibers (11, 12), mirror (13) reflecting at least Pumping wavelength is provided to appear at the end of the fiber. (7) carrying pump wavelength

Claims (7)

1.Fiber Active Optical Amplifier Which has been adapted to be connected to Optical Fiber (1) In optical telecommunication systems in which the amplifier itself consists of an active optical fiber rod (6) containing a laser emitter. The active fiber rod is modified (a) to be optical-fiber interconnected (1) for receiving light from that section at the transmission wavelength and (b) to be fed from the light source at the wavelength. The stamping which is below length The transmission wave in which the pumped light can be absorbed in the active fiber (6), provided that the active fiber (6) has the length corresponding to that required for partial absorption of the pumping light. That's right Directly fed, and at the end of the active fiber stream (6), an optional glass element (8) is present, which reflects light at the pumping wavelength and is transparent to light at the transmission wavelength. 2. Optical amplifier pursuant to claim 1 where the glass part (8) has a reflection condition within the active fiber less than -40 db at the transmission wavelength and above -10 db at the wavelength. Pumping 3. Optical amplifier according to claim 1, where the glass element (8) consists of a discontinuous component consisting of a dichroic glass and two focus groups, respectively. Which is modified to transmit light from active fibers to the dichroic glass and from the dichroic glass to Optical Fiber Telecom 4. Optical amplifier pursuant to claim 1, where a glass element consists of One or more monolithic optical fiber components 5. Optical amplifier according to claim 4, where the glass part (8) consists of an optical module (9) with an input fiber (10) connected to it. with The active fiber end (6) and it is modified to accept the transmission wavelength and the wavelength. Stamping, which is multiplexed in a single fiber And two output fiber, a decoder multiplex Modified to separate transmission wavelength to part output fiber and wavelength Pumping and going to another output fiber, output fiber (11) carrying wavelength The transmission, which is connected to the telecommunication fiber (7) and the output fiber (12) that carry the pumping wavelength, is provided with a mirror (13) modified to reflect. At least the pump wavelength 6. Optical amplifier according to claim 5, characterized by the glass element (8), is a dichroic glass having a reflection condition below -2 db at the signal wavelength and the reflection condition. Above -5 db at the pumping wavelength 7.Optical amplifiers according to claim 5, their characteristics are The de-multiplex (9) has an isolation greater than -10 db between the transmission wavelength and the Pump wavelength