Description
FOLS-B Stable Light Source Front View
FOLS-B Stable Light Source Data Transfer Port Illstration
FOLS-B Adjustable Light Source with Dual Power Supply
Field technicians often face invalid acceptance reports caused by unstable light‑source output. Traditional separate‑setup workflow requires manual wavelength and modulation configuration on both light source and power meter. Mismatched settings directly produce wrong loss‑test readings and trigger repeated site revisits.
FOLS‑B handheld fiber optical light‑source solves these real‑world pain‑points. It adopts high‑performance FP‑LD laser module, achieving excellent short‑term stability of ±0.05dB within 30 minutes. When paired with FOPM‑B optical power meter, the unique Wave‑ID function enables automatic wavelength synchronization, removing human‑error risks from manual configuration.
Output power can be continuously adjusted from ‑5dBm to ‑12dBm with real‑time LCD display readout. Multiple signal modes are supported: CW continuous‑wave plus 270Hz /330Hz /1kHz /2kHz modulation signals for multi‑fiber identification in dense cable bundles.
Four factory‑configured model options cover multimode, single‑mode, combined SM+MM and PON triple‑wavelength test scenarios. FC/PC output interface is standard. Dual‑power‑supply supports AA batteries for outdoor field deployment, or 5V DC adapter for long‑duration non‑stop running inside laboratory and production‑line environments. DF‑B laser upgrade is available as factory custom option.
This light‑source must be used together with optical power meter to complete fiber insertion‑loss measurement. It is widely adopted for FTTx/PON construction acceptance, CATV troubleshooting, data‑center cabling verification and optical‑component quality inspection.
Need matching optical power meter for insertion‑loss test? View our FOPM‑B.
For integrated full‑function fiber fault‑location test instrument, please view our mini OTDR product line.
Key Features
Excellent short‑term laser stability: ±0.05dB over 30 minutes, ensures repeatable insertion‑loss test results
Continuously adjustable output power: ‑5 ~ ‑12dBm, real‑time LCD power readout
Wave‑ID wavelength synchronization: auto‑match wavelength when paired with FOPM‑B, avoid manual setting mismatch error
Multi‑signal‑mode output: CW / 270Hz / 330Hz / 1kHz / 2kHz for multi‑fiber identification
Four wavelength model options: MM / SM / SM‑MM combo / PON triple‑wavelength for diverse test scenarios
FP-LD laser source, DFB laser available as factory custom option
Dual‑power‑supply: 3×AA batteries for field use; 5V DC adapter for lab / production‑‑line continuous‑‑test
10‑minute auto‑shutdown function to conserve battery power
Compact handheld housing; OEM / private‑label service supported
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
FOLS‑B = Handheld Fiber Optical Light Source.
Select model according to required wavelength set.
Custom configuration & OEM service supported.
Model # | Wavelength (nm) | Fiber Type |
FOLS‑8530B | 850 / 1300 | Multimode 62.5/125µm |
FOLS‑3155B | 1310 / 1550 | Single‑mode 9/125µm |
FOLS‑85303155B | 850/1300 & 1310/1550 | MM+SM combo 62.5/125 & 9/125µm |
FOLS‑314955B | 1310 / 1490 / 1550 | Single‑mode 9/125µm (PON triple‑wavelength) |
Note:
All models adopt FP‑LD laser, c/w FC/PC, SC/PC & ST/PC connector.
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 (DFB optional on request) |
Stability(20℃) | ±0.05dB /30min ; ±0.1dB /15min |
Output Power | adjustable ‑5 ~ ‑12dBm, step ±0.05dB |
Modulation | CW / 270Hz / 330Hz /1kHz / 2kHz |
Connector | FC-PC, SC/PC & ST/PC |
Mechanical & Environmental
Parameter | Value |
Power Supply | AA 1.5V ×3 (Alkaline / Ni‑MH) + DC 5V Adapter |
Auto Shutdown | 10 minutes |
Operating Temperature | −10 ~ +60 °C |
Storage Temperature | −25 ~ +70 °C |
Dimension / Weight | 175 × 90 × 44.5 mm / 255 g |
FAQ
Q1: What is Wave‑ID synchronization function for?
A: Wave‑ID enables automatic wavelength matching when FOLS‑B is paired with FOPM‑B optical power meter. It eliminates human error caused by manually setting mismatched wavelength on source and power meter, avoiding wrong insertion‑loss test readings and repeated site visits.
Q2: Can FOLS‑B work alone to test fiber insertion loss?
A: No. FOLS‑B is only a light source. To complete fiber insertion‑loss measurement, you have to pair it with an optical power meter, recommended FOPM‑B for full Wave‑ID sync function.
Q3: What are the differences among four FOLS‑B models?
A: FOLS‑8530B for multimode fiber (850/1300nm). FOLS‑3155B for regular single‑mode FTTx (1310/1550nm). FOLS‑85303155B is SM+MM combined model covering both multimode and single‑mode. FOLS‑314955B is PON triple‑wavelength version for PON network verification.
Q4: What is the meaning of ±0.05dB /30min stability specification?
A: Under 20℃ ambient temperature, laser output power drift will not exceed ±0.05dB within continuous 30‑minute running. Stable output ensures repeatable and valid fiber acceptance test results for engineering projects.
Q5: What scenarios are the two power‑supply modes suitable for?
A: Install 3×AA batteries for outdoor field construction and maintenance work. Connect 5V DC external adapter for long‑term non‑stop running in laboratory or production‑line QC environment.
Q6: Can I upgrade laser to DFB and request OEM private‑label?
A: Yes. DFB laser upgrade, custom output connector and OEM / private‑label service are available as factory custom options upon request.
