ALS Aerospace Light Source
A handheld LED light source that delivers a stable 85/85% Limited Phase Space launch for insertion loss testing of aerospace multimode fiber harnesses.
Technical overview
The ALS is used with an optical power meter to measure the loss of multimode fiber systems in applications that require the 85/85% Limited Phase Space modal launch condition, which Arden notes is widely used by Airbus for certifying optical fiber harnesses. Four variants cover 850 nm and 1300 nm LEDs into 50/125 um or 62.5/125 um fiber, all with FC connector interfaces and -20 dBm output. The launch is specified by the Near Field Pattern width at the 5%, 15% and 75% intensity levels. A built-in Li-Ion battery gives 48 hours of continuous use.
Features
- Compact hand held light source
- Insertion Loss testing for Aerospace applications
- Provides stable 85/85% launch conditions for multimode fiber measurements
- 1300 nm or 850 nm LED
- For 62.5/125 um or 50/125 um fiber
- Rechargeable Li-Ion battery with 48 hr life
- Certificate of Conformance provided as standard; Test Certificate available as an option
Specifications
| Parameter | Value |
|---|---|
| Source type | LED |
| Centre wavelength (ALS-1300 variants) | 1300 nm |
| Centre wavelength (ALS-0850 variants) | 850 nm |
| Spectral width (1300 nm variants) | <170 (FWHM) nm |
| Spectral width (850 nm variants) | 50 +/- 10 (FWHM) nm |
| Optical power output | -20 dBm into 62.5/125 um or 50/125 um fiber (variant dependent) |
| Optical power stability | +/- 0.05 dB |
| Optical launch condition | 85/85% Limited Phase Space |
| Connector interface | FC |
| Dimensions | 200 x 120 x 35 mm |
| Weight | 0.5 kg |
| Power | Built-in Li-Ion battery (external charger supplied) |
| Battery life | 48 hours continuous |
| Case | ABS |
| Operating temperature | 5 to 45 degC |
| Storage temperature | -10 to +60 degC |
| Humidity | 5% - 95%, relative, non-condensing |
| Launch condition, 62.5/125 fiber - Near Field Width at 5% of max | Maximum 55, Minimum 51 um |
| Launch condition, 62.5/125 fiber - Near Field Width at 15% of max | Maximum 52, Minimum 45 um |
| Launch condition, 62.5/125 fiber - Near Field Width at 75% of max | Maximum 33, Minimum 20 um |
| Launch condition, 50/125 fiber - Near Field Width at 5% of max | Maximum 44.0, Minimum 40.8 um |
| Launch condition, 50/125 fiber - Near Field Width at 15% of max | Maximum 41.6, Minimum 36.0 um |
| Launch condition, 50/125 fiber - Near Field Width at 75% of max | Maximum 26.4, Minimum 16.0 um |
| Ordering - ALS-1300-62-85-HH | 1300 nm LED light source with FC connector to deliver 85/85% modal launch into 62.5/125 um fiber |
| Ordering - ALS-1300-50-85-HH | 1300 nm LED light source with FC connector to deliver 85/85% modal launch into 50/125 um fiber |
| Ordering - ALS-0850-62-85-HH | 850 nm LED light source with FC connector to deliver 85/85% modal launch into 62.5/125 um fiber |
| Ordering - ALS-0850-50-85-HH | 850 nm LED light source with FC connector to deliver 85/85% modal launch into 50/125 um fiber |
Applications
- Insertion loss testing of aerospace optical fiber harnesses
- Certification of optical fiber harnesses requiring 85/85% Limited Phase Space launch
- Multimode fiber loss measurement with an optical power meter
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