Light Source


The Handheld Adjustable Light Source is Joinwit designed fiber optic tester, it aims at fiber network installation, fiber network engineering acceptance and fiber network maintenance. Combined usage with handheld optical power meter, it offers a quick and accurate testing solution on both SM and MM fibers. The tester provides 1 to 4 wavelengths and output power can be adjustable on customer requests. Also the tester features good appearance, good touch feeling and considerate humanity design.


  • Wave ID information can be transmitted when used with Optical Power Meter.
  • Tone generation, 270HZ,330HZ,1KHZ,2KHZ
  • Output power can be adjustable
  • Output power value is shown on LCD display
  • Intelligent backlight control (light intensity can be adjusted properly
    according to ambient light, which greatly reduced power consumption)
  • AA alkaline and AC adapter for power supply
  • Low battery indication


Model OLS
Operating wavelength(nm) 1310/1550;1310/1490/1550/1625(others specify on requests)
Applicable fiber SM,MM
Laser type FP-LD(others specify on requests)
Output Power(dBm) -5~-12dBm /(can be adjustable)
Adjustable step size(dBm) <0.5
Stability(dB,30min,20℃) 0.15
Modulation(Hz) CW, 270,330,1K,2K
Fiber Port FC/PC
Alkaline Battery 3*AA,1.5V
Power Supply Adaptor(V) 8.4
Battery Operating time(h) 45
Operation Temperature(℃) -10~+60
Storage Temperature(℃) -25~+70
Outline size(mm)/weight 180*90*45(250g)

Standard Package

All Models Optical Light Source, 3pcs 1.5V batteries, AC Adaptor, User Manual, Cotton swabs and Soft carrying case.