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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
ASTON PHOTONIC TECHNOLOGIES LIMITED	FARADAY WHARF ASTON SCIENCE PARK HOLT STREET BIRMINGHAM B7 4BB

International Classification(s)

• G01J:MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTE....

• 2002 Application Filing Year
• G01J Class
• 747 Applications Filed
• 274 Patents Issued To-Date
• 36.69 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Chisholm, Karen E	Birmingham, GB	1	3
# of filed Patents : 1 Total Citations : 3
Sugden, Catherine A	Birmingham, GB	2	10
# of filed Patents : 2 Total Citations : 10
Zhang, Lin	Birmingham, GB	453	3838
# of filed Patents : 453 Total Citations : 3838

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Patent Citation Ranking

• 3 Citation Count
• G01J Class

• 3.95 % this patent is cited more than
• 21 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

Full Text

US Patent No: 6768098

Fibre optic grating sensor

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Abstract

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A fiber optic grating sensor (10) comprising an optical fiber (12) in which a grating portion (14) is provided, the refractive index (16) of the fiber (12) varying periodically along the grating portion (14). The periodic variation of the refractive index (16) has an amplitude envelope which includes, in this example, two regions (24) in which the amplitude of the envelope is substantially reduced, and in this example is substantially nulled. The null regions (24) give the grating portion a spectral profile (20) within which there are, in this example two pass bands (18).

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Description

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Claims

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