Optical signal detectors comprising optical signal sensors and logarithmic amplifiers, systems comprising the same, and methods of use therefor
Optical signal detectors, systems including the detectors, and methods of using the detectors and systems are provided. The optical signal detector may include an aperture for receiving an optical signal, an optical signal sensor having separate photodiodes each configured to be irradiated with portions of the optical signal directed from the aperture, detect the portions of the optical signal impinging therewith, and generate analog signals therefrom, logarithmic amplifiers each configured to receive the analog signals from a corresponding one of the photodiodes of the optical signal sensor, perform logarithmic amplification of the received analog signals, and generate logarithmic analog signals from the analog signals.
1 . An optical signal detector, comprising:
an aperture for receiving an optical signal;
an optical signal sensor having separate photodiodes each configured to be irradiated with portions of the optical signal directed from the aperture, detect the portions of the optical signal impinging therewith, and generate analog signals therefrom, wherein the optical signal sensor is configured to have: (i) a wide dynamic range of at least 70 decibels (dB) or greater, (ii) a high bandwidth of at least 1 megahertz (MHz) or greater, and (iii) a high sensitivity of at most negative 60 decibel-milliwatts (dBm) or less; and
logarithmic amplifiers each configured to receive the analog signals from a corresponding one of the photodiodes of the optical signal sensor, perform logarithmic amplification of the received analog signals, and generate logarithmic analog signals from the analog signals.
2 . The optical signal detector of claim 1 , further comprising a communication device configured to receive the logarithmic analog signals from the logarithmic amplifiers and transmit the logarithmic analog signals to a remote system external and separate from the optical signal detector.
3 . The optical signal detector of claim 1 , wherein the aperture includes a lens configured to receive the optical signal therethrough and an optical tube assembly having a pair of components coupled to each other and configured to be rotated relative to each other to modify a dimension between the lens and the optical signal sensor.
4 . The optical signal detector of claim 1 , wherein the optical signal sensor has a size between 1 and 3 millimeters, wherein each logarithmic amplifier is individually functionally coupled with a corresponding pair of contacts associated with one of the photodiodes.
5 . The optical signal detector of claim 1 , wherein the photodiodes of the optical signal sensor are arranged in a pie-like configuration around a common center point of the optical signal sensor.
6 . A system, comprising:
an optical signal detector comprising:
an aperture for receiving an optical signal;
an optical signal sensor having separate photodiodes each configured to be irradiated with portions of the optical signal directed from the aperture, detect the portions of the optical signal impinging therewith, and generate analog signals therefrom, wherein the optical signal sensor is configured to have: (i) a wide dynamic range of at least 70 decibels (dB) or greater, (ii) a high bandwidth of at least 1 megahertz (MHz) or greater, and (iii) a high sensitivity of at most negative 60 decibel-milliwatts (dBm) or less;
logarithmic amplifiers each configured to receive the analog signals from a corresponding one of the photodiodes of the optical signal sensor, perform logarithmic amplification of the received analog signals, and generate logarithmic analog signals from the analog signals; and
a controller configured to, by one or more processors:
convert the logarithmic analog signals to digital data; and
determine an orientation of the optical signal relative to the optical signal detector including determining a position of a light spot of the optical signal on the optical signal sensor.
7 . The system of claim 6 , wherein the optical signal detector is a component of a first system, the controller is a component of a second system that is separate and remote from the first system, wherein the first system includes a first communication device configured to receive the logarithmic analog signals from the logarithmic amplifiers and transmit the logarithmic analog signals to the second system, wherein the second system includes a second communication device configured to receive the logarithmic analog signals or other signals derived therefrom.
8 . The system of claim 7 , wherein the second communication device of the second system is configured to transmit the orientation of the optical signal or data derived therefrom to the first system.
9 . The system of claim 6 , wherein the aperture includes a lens configured to receive the optical signal therethrough and an optical tube assembly having a pair of components coupled to each other and configured to be rotated relative to each other to modify a dimension between the lens and the optical signal sensor.
10 . The system of claim 6 , wherein the optical signal sensor has a size between 1 and 3 millimeters, wherein each logarithmic amplifier is individually functionally coupled with a corresponding pair of contacts associated with one of the photodiodes.
11 . The system of claim 6 , wherein the photodiodes of the optical signal sensor are arranged in a pie-like configuration around a common center point of the optical signal sensor.
12 . The system of claim 6 , wherein the controller is configured to, by the one or more processors, perform a sum function on the digital data.
13 . The system of claim 6 , further comprising a positioning apparatus configured to adjustably align the optical signal with a common center point of the photodiodes of the optical signal sensor based on the orientation of the optical signal as determined by the controller.
14 . A method, comprising:
receiving, with an optical signal detector, an optical signal from an optical signal source;
directing the optical signal to impinge upon photodiodes of an optical signal sensor of the optical signal detector, wherein the optical signal sensor is configured to have: (i) a wide dynamic range of at least 70 decibels (dB) or greater, a high bandwidth of at least 1 megahertz (MHz) or greater, a high sensitivity of not more that negative 60 decibel-milliwatts (dBm) or less;
sensing the optical signal with the photodiodes of the optical signal sensor;
generating, by each of the photodiodes, analog signals based on portions of the optical signal impinging thereon;
logarithmically amplifying the analog signals with logarithmic amplifiers to generate logarithmic analog signals;
converting, by one or more processors, the logarithmic analog signals to digital data; and
determining, by the one or more processors, an orientation of the optical signal relative to the optical signal detector without a normalization step.
15 . The method of claim 14 , wherein the one or more processors are components of a remote system external to and separate from the optical signal detector, wherein the method includes transmitting the logarithmic analog signals to the remote system.
16 . The method of claim 15 , further comprising transmitting the orientation of the optical signal or data derived therefrom from the remote system to a first system comprising the optical signal detector.
17 . The method of claim 14 , further comprising performing, by the one or more processors, a sum function on the digital data.
18 . The method of claim 14 , further comprising adjusting the optical signal detector to align the optical signal with a common center point of the photodiodes based on the orientation of the optical signal as determined by the one or more processors.
19 . The method of claim 18 , where adjusting the optical signal detector includes locating a center of a light spot of the optical signal on the optical signal sensor on a center point of the optical signal sensor.
20 . The method of claim 14 , further comprising adjusting an optical tube assembly of the optical signal detector by rotating a pair of coupled components thereof relative to each other to modify a dimension between a lens thereof receiving the optical signal and the optical signal sensor.