Fiber Metadata
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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.
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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
| 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 |
| 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 |
| attributeID | fiber_geometry Required |
|---|---|
| Description | Geometry of fiber. |
| Required | True |
| Type | String |
| Style | Controlled vocabulary |
| Units or options | [linear |
| Example | linear |
| attributeID | fiber_mode Required |
|---|---|
| Description | Mode of fiber. |
| Required | True |
| Type | String |
| Style | Controlled vocabulary |
| Units or options | [single-mode |
| Example | linear |
| 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 |
| 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 | - |
| attributeID | fiber_winding_angle_unit Optional |
|---|---|
| Description | Unit of fiber winding angle |
| Required | False |
| Type | String |
| Style | Controlled vocabulary |
| Units or options | degree |
| Example | - |
| 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 | - |
| 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 |
| 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 | - |
| 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 |
| 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 | - |
| 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 |
| 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 |
| 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 |
| 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 | - |
| 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 | - |
| attributeID | comment Optional |
|---|---|
| Description | Additional comments. |
| Required | False |
| Type | String |
| Style | Free form text |
| Units or options | -- |
| Example | na |