FOLS‑A is compact FP‑LD handheld fiber optical light‑source with high stability ±0.15dB over 8 hours. Four wavelength variants, CW & multi‑modulated output, FC/SC dual‑port design. Works with optical power‑meter for fiber insertion‑loss and multi‑fiber continuity testing.
• Excellent Long‑Term Stability — ±0.15dB over 8‑hours, delivers reliable repeatable loss‑measurement results • Four Wavelength Configurations — MM / SM / SM‑MM combo / PON triple‑wavelength for diverse fiber‑types • CW & Multi‑Modulated Output — CW, 270Hz, 1kHz, 2kHz signal for multi‑fiber identification on cable bundles • Dual‑Port & Dual‑Power Design — FC‑PC & SC‑PC dual connectors; AA batteries for field, 5V adapter for continuous testing
Accurate fiber‑link insertion‑loss and multi‑fiber continuity verification depends on consistent laser output. Low‑cost light sources suffer output drift after hours of operation, leading to fluctuating readings and invalid project acceptance reports.
FOLS‑A compact handheld fiber optical light‑source solves this pain‑point with FP‑LD laser module featuring excellent long‑term stability of ±0.15dB across 8 continuous working hours. It must be paired with optical power meter such as FOPM‑A series to complete end‑to‑end fiber‑link insertion‑loss measurement and multi‑fiber continuity checking.
Four factory‑configured model variants cover different test scenarios: multimode 850/1300, single‑mode1310/1550, combined SM+MM combo, and PON triple‑wavelength 1310/1490/1550 for PON‑network verification.
It supports continuous‑wave CW plus 270Hz / 1kHz / 2kHz modulated signals. Modulated frequency helps technicians pick target fiber out of dense bundled cables during field work. Built‑in FC‑PC and SC‑PC dual connector ports, no frequent adapter swapping required.
Dual‑power‑supply design: 3×AA batteries for outdoor field deployment; 5V AC adapter enables non‑stop long‑time running for laboratory or production‑line verification. Backlit LCD improves readability under dim conditions; 10‑minute auto‑shutdown prevents unnecessary battery drain.
It serves fiber splicers, FTTx installers, CATV and central‑office technicians for link loss certification, patch‑cord inspection and multi‑fiber continuity test.
Need matching optical power‑meter for insertion‑loss test? View our FOPM‑A / FOPM‑B / FOPM‑C series. For integrated full‑function fiber fault‑location test instrument, please view our mini OTDR product line.
Key Features
FP‑LD laser source, high long‑term stability: ±0.15dB over 8 continuous working hours
Four wavelength model variants: MM / SM / SM‑MM combo / PON triple‑wavelength (1310/1490/1550)
Support CW continuous‑wave plus 270Hz / 1kHz / 2kHz modulated signal for bundled‑fiber identification
Back‑lit LCD display, readable in dark cabinet or manhole environments
10‑minute auto‑shutdown to avoid accidental battery power consumption
Dual‑power‑supply: 3×AA batteries for field work; 5V AC adapter for continuous lab / production‑line testing
Compact ergonomic handheld housing; custom wavelength and OEM private‑label service availabl
Applications
FTTx construction & maintenance fiber‑link insertion‑loss testing
Multi‑fiber continuity check for bundled fiber cables
Central‑office patch‑cord and connector performance verification
CATV / HFC network acceptance and inspection
Data‑center structured cabling certification
PON network fiber‑link validation
Fiber‑optic technician practical‑skill training
Ordering Information
FOLS‑A = Handheld Fiber Optical Light Source. Select model according to required wavelength set.
Custom configuration & OEM service supported.
Model #
Wavelength (nm)
Fiber Type
FOLS‑8530A
850 / 1300
Multimode 62.5/125µm
FOLS‑3155A
1310 / 1550
Single‑mode 9/125µm
FOLS‑85303155A
850/1300 & 1310/1550
MM+SM combo 62.5/125 & 9/125µm
FOLS‑314955A
1310 / 1490 / 1550
Single‑mode 9/125µm (PON triple‑wavelength)
Note:
All models adopt FP‑LD laser, FC‑PC & SC‑PC dual ports.
Every unit is fully calibrated and tested before shipment.
Custom wavelength and OEM private‑label service are available.
Specifications subject to change without notice.
Technical Specifications
Optical Specifications
Parameter
Value
Laser Type
FP‑LD
Spectral Width
5 nm
Output Power
SM: ≥ −7 dBm; MM: ≥ −9 dBm
Long‑Term Stability
±0.15 dB / 8h
Signal Mode
CW / 270Hz / 1000Hz / 2000Hz (1310/1550nm)
Connector
FC‑PC & SC‑PC dual port
Mechanical & Environmental
Parameter
Value
Power Supply
AA 1.5V ×3; 5V AC external adapter
Auto Shutdown
10 minutes
Operating Temperature
−10 ~ +50 °C
Storage Temperature
−25 ~ +70 °C
Relative Humidity
0‑95% non‑condensing
Dimensions
185 × 84 × 48 mm
Weight
180 g
FAQ
Q1: What is FOLS‑A light‑source used for? A: FOLS‑A is FP‑LD handheld fiber optical light‑source. It must be paired with optical power‑meter for fiber insertion‑loss measurement and multi‑fiber continuity check, and cannot complete loss testing alone.
Q2: How to choose between four FOLS‑A variants? A: FOLS‑8530A for multimode fiber test. FOLS‑3155A for standard single‑mode FTTx. FOLS‑85303155A is SM plus MM combined version. FOLS‑314955A is PON triple‑wavelength model for PON‑network verification.
Q3: What does ±0.15dB /8h stability mean for field work? A: It represents output power drift within ±0.15dB for continuous 8‑hour operation. Stable laser output guarantees repeatable, valid fiber‑link acceptance test results for construction projects.
Q4: What are modulated‑frequency outputs used for? A: 270Hz /1kHz /2kHz modulated signals help technicians quickly identify target fiber among large bundled fiber cables in central‑office or field sites.
Q5: Why FOLS‑A uses FC‑PC & SC‑PC dual‑port design? A: Dual‑port integrates FC‑PC and SC‑PC connectors, avoids frequent swapping adapters when testing different patch‑cord types.
Q6: What are the two power‑supply modes suitable for? A: Install AA batteries for outdoor field maintenance. Connect 5V AC adapter for long‑term continuous test inside laboratory or production‑line.
Q7: Can I get custom wavelength and OEM private‑label service? A: Yes, custom wavelength configuration and OEM private‑label service are available upon request.
