Fiber metadata

Fiber Metadata

• The intention for a separate Fiber metadata is to uniquely identify the fiber used to make the measurements. More than one cable may be used over the course of an experiment and there may be several fibers within a cable.

• Required fields (mark with an asterisk, and indicated in the tables below) fiber_id* | cable_id* | fiber_geometry* | fiber_mode* | fiber_refraction_index*

• Optional fields fiber_winding_angle | fiber_winding_angle_unit | fiber_start_location | fiber_start_location_unit | fiber_end_location | fiber_end_location_unit | fiber_optical_length | fiber_optical_length_unit | fiber_one_way_attenuation | fiber_one_way_attenuation_unit | comment

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fiber_id

attributeID	fiber_id Required
Description	Unique identifier for the physical fiber, with a maximum of 8 alphanumeric characters with no special characters (e.g., underscores, period, dash).
Required	True
Type	String
Style	Alphanumeric
Units or options	--
Example	F001

cable_id

attributeID	cable_id Required
Description	Unique identifier associates this fiber to a specific cable.
Required	True
Type	String
Style	Alphanumeric
Units or options	--
Example	CA001

fiber_geometry

attributeID	fiber_geometry Required
Description	Geometry of fiber.
Required	True
Type	String
Style	Controlled vocabulary
Units or options	[linear
Example	linear

fiber_mode

attributeID	fiber_mode Required
Description	Mode of fiber.
Required	True
Type	String
Style	Controlled vocabulary
Units or options	[single-mode
Example	linear

fiber_refraction_index

attributeID	fiber_refraction_index Required
Description	Refractive index of the fiber (unitless). Typical value for single mode fiber is 1.4681.
Required	True
Type	Float
Style	na
Units or options	-
Example	1.4681

fiber_winding_angle

attributeID	fiber_winding_angle Optional
Description	If helical, this is the winding angle relative to the center of the cable.
Required	False
Type	Float
Style	na
Units or options	-
Example	-

fiber_winding_angle_unit

attributeID	fiber_winding_angle_unit Optional
Description	Unit of fiber winding angle
Required	False
Type	String
Style	Controlled vocabulary
Units or options	degree
Example	-

fiber_start_location

attributeID	fiber_start_location Optional
Description	The start distance along the fiber with respect to the interrogator, referred to as StartLocus in PRODML.
Required	False
Type	Float
Style	na
Units or options	-
Example	-

fiber_start_location_unit

attributeID	fiber_start_location_unit Optional
Description	Unit of fiber start location.
Required	False
Type	String
Style	Controlled vocabulary
Units or options	[meter
Example	meter

fiber_start_location

attributeID	fiber_start_location Optional
Description	The start distance along the fiber with respect to the interrogator, referred to as StartLocus in PRODML.
Required	False
Type	Float
Style	na
Units or options	-
Example	-

fiber_start_location_unit

attributeID	fiber_start_location_unit Optional
Description	Unit of fiber start location.
Required	False
Type	String
Style	Controlled vocabulary
Units or options	[meter
Example	meter

fiber_end_location

attributeID	fiber_end_location Optional
Description	The end location or distance along the fiber with respect to the interrogator.
Required	False
Type	Float
Style	na
Units or options	-
Example	-

fiber_end_location_unit

attributeID	fiber_end_location_unit Optional
Description	Unit of fiber end location.
Required	False
Type	String
Style	Controlled vocabulary
Units or options	[meter
Example	meter

fiber_optical_length

attributeID	fiber_optical_length Optional
Description	Total length of this fiber. Typically, it is the sum of fiber_start_location and fiber_end_location.
Required	False
Type	Float
Style	na
Units or options	-
Example	8400

fiber_optical_length_unit

attributeID	fiber_optical_length_unit Optional
Description	Unit of fiber optical length.
Required	False
Type	String
Style	Controlled vocabulary
Units or options	[meter
Example	meter

fiber_one_way_attenuation

attributeID	fiber_one_way_attenuation Optional
Description	Power loss for one-way travel of a beam of light. Typical value for single mode fiber is 0.4.
Required	False
Type	Float
Style	na
Units or options	-
Example	-

fiber_one_way_attenuation_unit

attributeID	fiber_one_way_attenuation_unit Optional
Description	Unit of fiber optical length.
Required	False
Type	String
Style	Controlled vocabulary
Units or options	[decibels/meter
Example	-

comment

attributeID	comment Optional
Description	Additional comments.
Required	False
Type	String
Style	Free form text
Units or options	--
Example	na