Packaged optical amplifier assembly
First Claim
1. A packaged optical amplifier assembly for amplifying an optical signal, the assembly having an input for receiving an optical signal from an input optical fibre, an output for passing an amplified optical signal to an output optical fibre, an optical amplifying fibre having a first end coupled to the input and a second end coupled to the output, and an optical pump coupled to an end of the optical amplifying fibre, wherein the optical signal is collimated and propagates unguided between the input and the first end of the optical amplifying fibre, and is collimated and propagates unguided between the second end of the optical amplifying fibre and the output, the optical pump light from the optical pump being collimated and arranged to propagate unguided between the optical pump and the end of the fibre to which it is coupled, in which the optical pump light and optical signal are combined by a dichroic mirror, and in which there is an optical isolator between either or both of(i) the input and the first end of the optical amplifying fibre, and(ii) the second end of the optical amplifying fibre and the output.
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Accused Products
Abstract
A packaged optical amplifier assembly includes an erbium doped silica based optical amplifying fiber (330) co-pumped and counter-pumped by a pair of laser diodes (336) as optical pumps. The optical pumps (336) are each coupled to an end (332, 340) of the fiber (330) by reflection from a dichroic mirror (328), the optical signal being collimated and arranged to propagate unguided between the input (306) and the first end (332), and the second end (340) and the output (346), and optical pump light from each optical pump (336) being collimated and arranged to propagate unguided between the optical pump (336) and the end of the fiber (332, 340) to which it is coupled.
101 Citations
12 Claims
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1. A packaged optical amplifier assembly for amplifying an optical signal, the assembly having an input for receiving an optical signal from an input optical fibre, an output for passing an amplified optical signal to an output optical fibre, an optical amplifying fibre having a first end coupled to the input and a second end coupled to the output, and an optical pump coupled to an end of the optical amplifying fibre, wherein the optical signal is collimated and propagates unguided between the input and the first end of the optical amplifying fibre, and is collimated and propagates unguided between the second end of the optical amplifying fibre and the output, the optical pump light from the optical pump being collimated and arranged to propagate unguided between the optical pump and the end of the fibre to which it is coupled, in which the optical pump light and optical signal are combined by a dichroic mirror, and in which there is an optical isolator between either or both of
(i) the input and the first end of the optical amplifying fibre, and (ii) the second end of the optical amplifying fibre and the output.
Specification