High dynamic receiver for free space optics application
First Claim
1. A receiver for receiving a light beam carrying a signal in a free space optics telecommunication system, the receiver comprising:
- a first receiving device having a first saturation level and a first sensitivity;
a second receiving device having a second saturation level and a second sensitivity;
means for focusing said received light beam;
a beam splitter for splitting the focused light beam into a first portion towards the first receiving device and into a second portion towards the second receiving device; and
a switch for switching between the first receiving device and the second receiving device according to a level of said signal.
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Accused Products
Abstract
A receiver for an optics telecommunication system, the receiver comprises a first receiving device and means for focusing a received light beam carrying a signal towards such first receiving device. The receiver is characterized in that it further comprises at least a second receiving device and a beam splitter for splitting the focused light beam partially towards the first receiving device and partially towards the at least second receiving device. Tipically, the first receiver device is an APD diode while the second receiver device is a PIN diode. The telecommunication system is a Free Space Optics telecommunication system. A method is also described. The invention results in a high dynamic receiver. The dynamic of the invention receiver could be up to the sum of the dynamics of receivers provided with single receiving device (APD or PIN).
5 Citations
19 Claims
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1. A receiver for receiving a light beam carrying a signal in a free space optics telecommunication system, the receiver comprising:
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a first receiving device having a first saturation level and a first sensitivity; a second receiving device having a second saturation level and a second sensitivity; means for focusing said received light beam; a beam splitter for splitting the focused light beam into a first portion towards the first receiving device and into a second portion towards the second receiving device; and a switch for switching between the first receiving device and the second receiving device according to a level of said signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for providing high dynamic range in a receiver, the receiver comprising receiver for receiving a light beam carrying a signal in a free space optics telecommunication system, the receiver comprising a first receiving device having a first saturation level and a first sensitivity, the method comprising the steps of:
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providing a second receiving device having a second saturation level and a second sensitivity; focusing said received light beam; splitting the focused light beam into a first portion towards the first receiving device and into a second portion towards the second receiving device; and switching between the first receiving device and the second receiving device according to a level of said signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification