Test & Inspection

Fiber Identifier (OFI) (2)
Optical Fiber Identifiers work by creating a safe micro-bend in a live optical fiber which ..
Inspection Scope (9)
Optical and video Fiber Inspection Scopes conveniently enable end-face visual inspecti..
Launch Cable (13)
Eliminate dead zones and uncertainty for a reliably accurate trace through your fiber line ..
Light Source (12)
Light sources are paired with optical power meters to create optical loss test sets or OLTs..
Loss Test Set (OLTS) (14)
Optical Loss Test Set (OLTS) includes both a meter and light source used to measure inserti..
OTDR (22)
An Optical Time Domain Reflectometer (OTDR) analyzes the light loss in an optical fiber net..
Power Meter (OPM) (20)
An Optical Power Meter (OPM) is a device used to measure optical power out from the end of ..
Visual Fault Locator (VFL) (6)
A Visual Fault Locator (VFL) is a critical tool used to visually locate breaks or in some i..
Test & Inspection

Test & Measurement Instruments

  • Test and Measurement Techniques
    • Installation Testing
    • Maintenance Testing
  • Fiber Optic Test Equipment
    • Optical Power Meter
    • Optical Light Source
    • Optical Loss Meter
    • Attenuators
      • Variable
      • Fixed
    • Fiber Indentifier
    • Visual Fault Locator
    • Optical Talk Set
    • Optical Time Domain Reflectormeter (OTDR)
      • How OTDR Works
      • OTDR Basic Components
      • Basic Features of OTDR Trace
      • Fiber Roll Off and Dynamic Range
      • Pulse width effect in OTDR
      • Averaging
      • Ghost Echo’s
      • Ten Typical OTDR Traces and Interpretations
      • OTDR Application
  • Bandwidth Testing

Test & Measurement Techniques

There are two major categories of measuring techniques used in optical fiber systems.

  • Installation Testing ( Functional )
  • Maintenance Testing ( Performance )

Standardized measurement and testing techniques are important to precisely define the parameters under which a fiber optic system or any of its components will function. While evaluating the performance of a systems, all the components that comprise the system must be considered.

Testing before and after the installation facilitate us to check that optical fiber cable has been handled and installed in such a way that its quality and transmission characteristic have not been altered.

A:  Installation Testing

  •  Delivery Testing
    • No Physical damage
    • Optical fiber length
    • Attenuation at 1310nm and 1550nm
  • Measurement after cable laying
    • No abnormal stress
    • Optical fiber length measurement
    • Attenuation at 1310 nm and 1550 nm
  • Splice loss measurement
  • Verification of the completed installation ( OTDR Prints out )
  • Protocol from measuring with stabilized light source and power meter.

B:  Maintenance Testing

Maintenance Testing should performed in order to discover and rectify changes in the transmission parameters for a fiber optic Information network. These test should be scheduled to conduct at two years intervals so that new measured value should be compared with those at the time of installation. All changes should be notified and attended to.

Following are the test details start from fiber optic manufacturing to fiber optic installation and maintenance.

  • Tests Relating to manufacturer
  • Tests relating to mechanical characteristics
  • Tests relating to environment characteristics
  • Tests relating to other fiber optic components
  • Tests after the installation of optical fiber


A:  Tests Relating to Manufacturer:

As a quality control measure during manufacturing of fibers, the manufacturers must   constantly test the fibers to ensure that they meet the specifications. Among such tests are the   following:

  •   Core diameter
  •   Cladding diameter
  •   Numerical Aperture (NA)
  •   Attenuation
  •   Refractive index profile
  •   Tensile strength

B:  Tests relating to Mechanical Characteristics:

  •   Impact resistance
  •   Tensile loading
  •   Crush resistance Test

C:  Tests relating to Environment Characteristics:

These tests evaluate the changes in attenuation under extremes of temperature, repeated   changes of temperature and humidity.

D:  Tests relating to other Fiber Optic Components:

These tests are performed during and after installation of optical fiber link. These test include:

  • Sources & Detectors
  • Connectors
  • Couplers

E:  Test after the installation of optical fiber.

These test ensure that the installed system will meet performance requirements, for example, during installation each splice must be tested. If the loss is unacceptably high, the fibers must be replaced.

Fiber Optic Test Equipment

Following are the most widely used test equipment in fiber optics:

  • Optical Power Meter
  • Optical Light Source
  • Optical Loss Meter
  • Optical Attenuator
  • Fiber Identifier
  • Talk Set
  • Visual Fault Locator
  • Optical Time Domain Reflectometer ( OTDR )