0.48 NA Step-Index Multimode Fibers
Features- Broad UV/VIS/NIR Spectral Range:
- 300 to 1200 nm (High OH)
- 400 to 2200 nm (Low OH)
- Reduced Static Fatigue, Lower Microbend Losses
- Biocompatible Materials, Radiation Resistance
- Sterilizable by ETO and Other Methods
Our 0.48 NA polymer-clad fibers offer high numerical apertures to suit a broad range of applications, from remote illumination to photodynamic therapy. The cladding material utilized to achieve the large NA of these fibers is a softer polymer than normally found in polymer clad step-index multimode fibers. Consequently, the cladding material has a higher probability of being removed from the fiber when the buffer is being stripped for normal connectorization. The difference between the indices of refraction of the core and the cladding determine the NA. Thus, without the cladding, the performance of this fiber is greatly diminished. To combat this problem, Thorlabs terminates to the buffer instead of terminating to the cladding. That is, the connector is epoxied directly onto the fiber buffer, thereby eliminating the need to strip the buffer, and the cladding, off of the fiber. The image in the upper right corner shows this difference. Thorlabs offers the SMA-connectorized version of select 0.48 NA multimode fibers as stocked items and can produce custom SMA versions of any of the fibers below with a fast turnaround. Please see the Custom Cables tab above for details. If your application requires another connector type, we suggest you try our 0.39 NA Multimode Patch Cords or Fiber. We have compared the performance of an ideal 0.48 NA fiber with a 0.39 NA fiber using an LED light source and have determined that there is no significant difference in the performance. If you would still prefer the 0.48 NA fiber, Thorlabs also offers an FC/PC-to-SMA Mating Sleeve that can be used to convert an SMA connector to an FC/PC connector. Pleae contact Technical Support if you need a different connector and these options do not meet your needs.
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| Fiber | OH Content | Core
Diameter | Hard Cladding
Diameter | Buffer
Diameter | Bend Radius
(Momentary/Long Term)* |
|---|
| BFL48-400 | Low OH | 400 μm ± 2% | 430 μm ± 2% | 730 μm ± 2% | 21.5 mm / 64.5 mm | | BFH48-400 | High OH | | BFL48-600 | Low OH | 600 μm ±2 % | 630 μm ± 2% | 1040 μm ± 2% | 31.5 mm / 94.5 mm | | BFH48-600 | High OH | | BFL48-1000 | Low OH | 1000 μm ± 2% | 1035 μm ± 2% | 1400 μm ± 5% | 51.8 mm / 155 mm | | BFH48-1000 | High OH |
* - 100/300 Times Cladding Radius
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