Overview
The Jonard Tools FLS-50 is a single-mode fiber optic light source designed to provide stable 1310 nm or 1550 nm wavelengths. It serves as a primary tool for optical loss measurements when paired with a compatible optical power meter, such as the FPM-50A.
The unit features four distinct modulation outputs (CW, 270 Hz, 1 kHz, 2 kHz) to facilitate fiber identification and testing. It is constructed with a shatter-resistant sleeve for field durability and a flush-button interface to protect against dust ingress. The device is intended for use in diverse testing environments, featuring a backlit LCD screen for visibility in low-light conditions.
Downloads:
- Jonard Multimode and Single Mode Optical Light Sources Datasheet
- FLS-50 Fiber Optic Light Source Instruction Manual
Key Features
-
Dual Wavelength Output
Provides 1310 nm and 1550 nm wavelengths for versatile single-mode fiber testing. -
Modulation Modes
Supports CW, 270 Hz, 1 kHz, and 2 kHz frequencies for compatibility with fiber identifiers. -
Included Adapters
Includes interchangeable FC, SC, and LC adapters for direct connectivity to common PC/UPC connectors. -
Rugged Construction
Equipped with a shatter-resistant sleeve to protect the housing from accidental drops. -
Backlit LCD Display
Ensures clear readability of settings and status in dark work areas. -
Flush Button Design
Prevents dust accumulation and protects controls during transport and storage.
Applications
- Single-mode fiber cable loss measurement
- Fiber network troubleshooting
- Optical power budget verification
Package Contents
- Fiber Optic Light Source (SM)
- FC Adapter
- LC Adapter
- SC Adapter
- (2) Cleaning Swabs
- (3) AA 1.5V Alkaline Batteries
- Storage Pouch
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | Jonard Tools |
| Model | FLS-50 |
| Part Number | 054X236 |
| Connector Types | 1.25 mm LC and 2.5 mm FC/SC |
| Wavelengths | 1310, 1550 nm |
| Typical Output Power | -7 dBm |
| Output Stability | ± 0.05 dB / 15 min or ± 0.1 dB / 8 hr |
| Spectral Width | ≤ 10 nm |
| Modulation Frequencies | CW / 270 Hz / 1 kHz / 2 kHz |
| Battery Type | (3) AA 1.5V alkaline batteries |
| Operating Temperature | -10 to +60°C |
| Storage Temperature | -25 to +70°C |
| Dimensions | 7" x 3 3/16" x 1 1/4" (17.78 cm x 8.10 cm x 3.18 cm) |
| Weight | 0.67 lb (304.18 g) |
Frequently Asked Questions
What is the purpose of the modulation frequencies?
The modulation frequencies (270 Hz, 1 kHz, 2 kHz) allow the light source to be used with compatible fiber identifiers to detect specific fibers in a bundle without disconnecting the link.
Can this unit test APC connectors?
This unit is designed for PC/UPC connectors. Using APC connectors may result in damage or incorrect readings.
Is the LC adapter interchangeable?
Yes, the FLS-50 comes with dedicated adapters for FC, SC, and LC to ensure compatibility with different patch cables.
What is the signal loss impact of the LC adapter?
The LC adapter may contribute up to 0.3 dB of signal loss during measurement.
Does it require external power?
No, the unit operates on (3) AA 1.5V alkaline batteries, which are included.