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OLS Series Light Sources


  • Encircled Flux Compliant - with optional mode conditioner
  • 5-Year Product Warranty
  • Integrated LED and Laser light source


  • Certify multimode and single-mode links per TIA/EIA standards
  • Certify Multimode fiber links for Gigabit Ethernet (GBE
  • Test Ethernet, Token Ring, and FDDI fiber networks
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Product Description

OLS Series Light Sources 

The OLS Light Sources from AFL are hand-held, rugged, integrated two-port light sources designed for performing insertion loss measurements on multimode or single-mode fiber optic links when used with an optical power meter. The LED and LASER outputs are stabilized to ensure accurate test results per current TIA/EIA requirements.

OLS4 Output Ports:

  • Multimode output port; 850/1300 nm LED output at CW, WaveID, or dual wavelength WaveID 
  • Single-mode output port; 1310/1550 nm LASER output at CW, WaveID, dual wavelength WaveID, or 2 kHz Tone

Faster Test Times with WaveID – In WaveID mode, the encodes each wavelength with a unique WaveID code.  When used with a power meter, the pair can send and receive two wavelengths each test – doubling testing efficiency – reducing test time! (Excluding OLS1)

Flexible Output Connector Adapter Design

The OLS4 output ports are equipped with UCI based removable adapters to allow the output connectors to be inspected and cleaned, while allowing field change of output style between FC, SC, ST, and LC connector adapters.

50 and 62.5 µm fiber mandrels Included (OLS1 & OLS4)

Mandrels condition test cable for use in certifying both 50 and 62.5 µm fiber links for current and planned high bit rate applications including Gigabit Ethernet and 10 Gigabit Ethernet.  Mandrels apply to launch jumpers is seconds without tools and ensure loss measurements comply with TIA/EIA-568-B standard.

Encircled Flux Compliance (OLS1 & OLS4)

International standards bodies established Encircled Flux (EF) guidelines (TIA-568-14-B and IEC 61280-1-4) to improve mulitmode fiber measurement repeatability by reducing loss measurement variation to within a target range of ± 10%.

EF Mode Conditioners attach to the output of your multimode source ensuring the "conditioned output" meets Encircled Flux specifications.  Compliance requires matching the output fiber size to the network fiber under test. AFL offers both 50 µm and 62.5 µm EF Mode Conditioners.  See below for list of fiber and connector combinations available. 

Key Specifications

  • MM Optical Port Wavelengths: 850 and 1300 nm
  • MM Output Power: > -20 dBm, 62.5 µm multimode
  • SM Optical Port Wavelengths: 1310 and 1550 nm
  • SM Output Power: 0 dBm, 9 µm single-mode
  • Output connector: FC, SC, ST, LC switchable (One style supplied with unit, order others separately) 
  • Battery: 2 x AA Alkaline, optional AC adapter

Ordering Information


OLS Series Models 

Model  MM/SM  Wavelengths (nm)
OLS7-FTTx  SM  1310, 1490, 1625
OLS7-FTTH  SM  1310, 1490, 1550
OLS7-3  SM  1310, 1550, 1625
OLS4  MM/SM  850, 1300/1310, 1550
OLS2-Dual  SM  1310, 1550
OLS1-Dual  MM  850, 1300

Accessories and Connector Adapters

FC adapter
SC adapter
ST adapter
LC adapter
Universal flip-top dust cap for UCI outputs
100-240 VAC to 9 VDC


Encircled Flux Mode Conditioners

AFL Part Number  Fiber Size  Connectors
8700-06-0001MR  50/125 µm  FC/FC
8700-06-0002MR  62.5/125 µm  FC/FC
8700-06-0003MR  50/125 µm  SC/SC
8700-06-0004MR  62.5/125 µm  SC/SC
8700-06-0005MR  50/125 µm  SC/LC
8700-06-0006MR  62.5/125 µm  SC/LC

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