OPTICAL POWER MONITOR, OPTICAL POWER CONTROL SYSTEM AND OPTICAL POWER MONITOR METHOD
First Claim
1. An optical power monitor that detects optical power of respective wavelengths of a signal light in a wavelength multiplexing system, comprising:
- a light emitter configured to superimpose a frequency modulation component on a signal light;
a wavelength tunable filter configured to sweep a pass band of the signal light across a wavelength band for a signal light; and
a detector configured to detect intensity changes in optical power passing through the wavelength tunable filter with a frequency modulation of the optical power, and to detect an optical power measurement value at a middle point of two points of the intensity changes of the optical power as the optical power of a wavelength to be measured.
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Accused Products
Abstract
An optical power monitor that detects optical power of respective wavelengths of a signal light in a wavelength multiplexing system, includes: a light emitter configured to superimpose a frequency modulation component on a signal light; a wavelength tunable filter configured to sweep a pass band of the signal light across a wavelength band for a signal light; and a detector configured to detect intensity changes in optical power passing through the wavelength tunable filter with a frequency modulation of the optical power, and to detect an optical power measurement value at a middle point of two points of the intensity changes of the optical power as the optical power of a wavelength to be measured.
79 Citations
8 Claims
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1. An optical power monitor that detects optical power of respective wavelengths of a signal light in a wavelength multiplexing system, comprising:
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a light emitter configured to superimpose a frequency modulation component on a signal light; a wavelength tunable filter configured to sweep a pass band of the signal light across a wavelength band for a signal light; and a detector configured to detect intensity changes in optical power passing through the wavelength tunable filter with a frequency modulation of the optical power, and to detect an optical power measurement value at a middle point of two points of the intensity changes of the optical power as the optical power of a wavelength to be measured. - View Dependent Claims (2, 3)
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4. An optical power control system comprising:
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an optical power monitor configured to detect optical power of respective wavelengths of a signal light; and a controller configured to control the optical power, wherein the power monitor includes; a light emitter configured to superimpose a frequency modulation component onto a signal light; a wavelength tunable filter configured to sweep a pass band of the signal light across a wavelength band for a signal light; and a detector configured to detect intensity changes in optical power passing through the wavelength tunable filter with a frequency modulation of the optical power, and to detect an optical power measurement value at a middle point of two points of the intensity changes of the optical power as the optical power of a wavelength to be measured, wherein the controller controls the light emitter based on a detected optical power. - View Dependent Claims (5, 6, 7)
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8. An optical power monitor method for detecting optical power of respective wavelengths of a signal light in a wavelength multiplexing system, comprising:
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superimposing a frequency modulation component on a signal light; sweeping a pass band of a wavelength tunable filter across a wavelength-band for a signal light; detecting intensity changes in a optical power passing through the wavelength tunable filter with a frequency modulation of the optical power; and detecting an optical power measurement value at a middle point of two intensity change points of the optical power along a sweep direction as the optical power of a wavelength to be measured.
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Specification