Method and apparatus for the monitoring and control of a process
First Claim
1. A pitch side optical system for use in diode laser spectroscopy comprising:
- more than one diode laser having a select lasing frequency, each diode laser being coupled to a proximal end of a distinct input optical fiber;
a multiplexer optically coupled to a distal end of fewer than all of the input optical fibers, the multiplexer optically coupling multiplexed laser light from the fewer than all of the input optical fibers to a proximal end of a pitch side optical fiber;
a coupler optically coupled to a distal end of the pitch side optical fiber and a distal end of an un-multiplexed input optical fiber, the coupler optically coupling multiplexed laser light from the pitch side optical fiber and un-multiplexed laser light from the un-multiplexed input optical fiber to a proximal end of a transmission optical fiber; and
a pitch optic optically coupled to a distal end of the transmission optical fiber.
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Accused Products
Abstract
A pitch side optical system for use in diode laser spectroscopy consisting of more than one diode laser having select lasing frequencies with each diode laser being coupled to an end of a distinct input optical fiber. The pitch side optical system further consists of a multiplexer optically coupled to the other end of less than all of the input optical fibers with the multiplexer outputting multiplexed laser light to a pitch side optical fiber. The pitch side optical system further consists of a coupler optically coupled to the far end of the pitch side optical fiber and the far end of an unmultiplexed input optical fiber with the coupler combining the multiplexed laser light and the unmultiplexed laser light and outputting the combined light to a transmission optical fiber. Typically, the coupler is located near the combustion process. The pitch side optical system further consists of a pitch optic coupled to the transmission optical fiber. Typically, all optical fibers used in the pitch side optical system are single mode optical fibers.
37 Citations
14 Claims
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1. A pitch side optical system for use in diode laser spectroscopy comprising:
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more than one diode laser having a select lasing frequency, each diode laser being coupled to a proximal end of a distinct input optical fiber; a multiplexer optically coupled to a distal end of fewer than all of the input optical fibers, the multiplexer optically coupling multiplexed laser light from the fewer than all of the input optical fibers to a proximal end of a pitch side optical fiber; a coupler optically coupled to a distal end of the pitch side optical fiber and a distal end of an un-multiplexed input optical fiber, the coupler optically coupling multiplexed laser light from the pitch side optical fiber and un-multiplexed laser light from the un-multiplexed input optical fiber to a proximal end of a transmission optical fiber; and a pitch optic optically coupled to a distal end of the transmission optical fiber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of inputting light to a diode laser spectroscopy system comprising:
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coupling light from each of more than one diode laser having a select lasing frequency to a proximal end of a distinct input optical fiber; multiplexing the output of fewer than all of the input optical fibers; coupling multiplexed laser light from the fewer than all of the input optical fibers to a proximal end of a pitch side optical fiber; optically coupling multiplexed laser light from the pitch side optical fiber and un-multiplexed laser light from the un-multiplexed input optical fiber to a proximal end of a transmission optical fiber; and coupling the output of the transmission optical fiber to a pitch optic. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification