MICROPROCESSOR BASED MULTI-JUNCTION DETECTOR SYSTEM AND METHOD OF USE

• US 20140021335A1
• Filed: 08/31/2011
• Published: 01/23/2014
• Est. Priority Date: 09/05/2010
• Status: Abandoned Application

• Current Assignee: Newport Corporation (MKS Instruments Incorporated)
• Original Assignee: Newport Corporation (MKS Instruments Incorporated)
• Inventors: Ciocan, Razvan, Donohue, John, Assalone, Domenic, Han, Dae, Li, Zhuoyun
• Application Number:
  US13/819,695
• Publication Number:
  US 20140021335A1
• Time in Patent Office: Days
• US Class Current: 250/214.A
• CPC Class Codes: G01J 1/4228 arrangements with two or more detectors, e.g. for sensitivity compensation
• CPC Class Codes: H01L 27/1443 with at least one potential jump or surface barrier
• CPC Class Codes: H01L 27/1446 in a repetitive configuration
• CPC Class Codes: H01L 31/02019 for devices characterised by at least one potential jump barrier or surface barrier
• CPC Class Codes: H01L 31/09 Devices sensitive to infrared, visible or ultraviolet radiation H01L31/101 takes precedence
• CPC Class Codes: H04N 23/76 by influencing the image signals
• CPC Class Codes: H04N 25/57 Control of the dynamic range

Abstract

The disclosure relates to a photodetector system including a multi-junction detector having a first junction configured to generate a first current when irradiated with a first optical radiation component within a first spectral range, and at least a second junction configured to generate a second current when irradiated with a second optical radiation component within a second spectral range that is different than the first spectral range. The photodetector system also comprises a microprocessor adapted to generate a first indication related to a first characteristic of the first optical radiation component based on the first current, and generate a second indication related to a second characteristic of the second optical radiation component based on the second current.

Claims

1. A photodetector system, comprising:

a housing having at least one aperture formed therein;

at least one multi-junction photodetector device positioned within the housing, the photodetector having a first junction configured to generate a first photocurrent when irradiated with optical radiation within a first spectral range and having at least a second junction configured to generate a second photocurrent when irradiated with optical radiation within at least a second spectral range;

a first transimpedence amplifier and at least a second transimpedence amplifier positioned within the housing and in communication with the photodetector;

at least one analog to digital converter positioned within the housing and in communication with the first and second transimpedence amplifiers;

at least one microprocessor positioned within the housing and in communication with the analog to digital converter;

at least one memory device in communication with the microprocessor; and

at least one device interface positioned within the housing and in communication with the microprocessor.

2. The photodetector system of claim 1, wherein the device interface comprises a communication device.

3. The photodetector system of claim 1, wherein the device interface comprises a wireless communication device.

4. A photodetector system, comprising:

a multi-junction photodetector device comprising;

a first junction configured to generate a first current when irradiated with a first optical radiation component within a first spectral range; and

at least a second junction configured to generate a second current when irradiated with a second optical radiation component within a second spectral range that is different than the first spectral range; and

a microprocessor adapted to;

generate a first indication related to a first characteristic of the first optical radiation component based on the first current; and

generate a second indication related to a second characteristic of the second optical radiation component based on the second current.

5. The photodetector system of claim 4, wherein the first characteristic of the first optical radiation component comprises a first power level of the first optical radiation component.

6. The photodetector system of claim 5, wherein the second characteristic of the second optical radiation component comprises a second power level of the second optical radiation component.

7. The photodetector system of claim 4, further comprising:

a first device adapted to generate a first analog voltage based on the first current; and

at least a second device adapted to generate a second analog voltage based on the second current.

8. The photodetector system of claim 7, wherein the microprocessor is adapted to control a first gain of the first device, and control a second gain of the second device.

9. The photodetector system of claim 8, wherein the microprocessor is adapted to control the first gain of the first device in order to minimize compression of the first device at a first defined high power level of the first optical radiation component, and control the second gain of the second device in order to minimize compression of the second device at a second defined high power level of the second optical radiation component.

10. The photodetector system of claim 8, wherein the microprocessor is adapted to control the first gain of the first device in order to achieve a first defined sensitivity for the first device at a first defined low power level of the first optical radiation component, and control the second gain of the second device in order to achieve a second defined sensitivity for the second device at a second defined low power level of the second optical radiation component.

11. The photodetector system of claim 7, further comprising an analog-to-digital converter adapted to convert the first analog voltage into a first digital voltage, and convert the second analog voltage into a second digital voltage.

12. The photodetector system of claim 11, further comprising a multiplexer adapted to multiplex the first and second digital voltages onto an output, wherein the microprocessor is adapted to receive the first and second digital voltages from the output of the multiplexer.

13. The photodetector system of claim 4, further comprising a communication device adapted to facilitate communication of information between the microprocessor and one or more external devices.

14. The photodetector system of claim 13, wherein the microprocessor is adapted to provide data related to the first and second indications to the one or more external devices by way of the communication device.

15. The photodetector system of claim 7, further comprising an analog interface connector adapted to output the first and second analog voltages for transmission to one or more external devices.

16. The photodetector system of claim 15, wherein the microprocessor is adapted to enable or disable the outputting of the first and second analog voltages via the analog interface connector.

17. The photodetector system of claim 11, further comprising a digital interface connector adapted to output the first and second digital voltages for transmission to one or more external devices.

18. The photodetector system of claim 17, wherein the microprocessor is adapted to enable or disable the outputting of the first and second digital voltages via the digital interface connector.

19. The photodetector system of claim 4, further comprising a memory including one or more software modules readable and executable by the microprocessor, wherein the memory further comprises data related to the first and second indications.

20. The photodetector system of claim 4, further comprising a power supply adapted to supply a first bias voltage to the multi-junction photodetector device, and a second bias voltage to the microprocessor.

21. A photodetector system, comprising:

a multi-junction photodetector device comprising;

a first junction configured to generate a first current when irradiated with a first optical radiation component within a first spectral range; and

a second junction configured to generate a second current when irradiated with a second optical radiation component within a second spectral range that is different than the first spectral range; and

a circuit adapted to;

generate a first indication related to a first characteristic of the first optical radiation component based on the first current; and

generate a second indication related to a second characteristic of the second optical radiation component based on the second current.