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Home > Products > Photonics Instruments, Fibers, and Components > Optical Fibers and Accessories > Step Index Multimode Fibers

Step Index Multimode Fibers
Step Index Multimode Fibers

  • Bend-insensitive, high NA fibers, for applications requiring high coupling efficiencies or tight fiber bending radii
  • High-temperature, all-silica fibers, frequently used in medical and industrial fiber sensors
  • Fibers available in any length
  • Standard patchcords available in several length with various type connector terminations.

Product Description Product Detail Specifications Catalog PDF
Product Description
The following volume discount schedule is automatically applied when ordering bare optical fiber: 6 - 30 m with 15 %, 31- 500 m with 22 %, >500 m with 25 %

Bend-insensitive, pure silica, multimode Sensor Grade Fibers feature core diameters ranging from 100–1000 µm. A bonded hard polymer cladding enhances the fibers’ strength and fatigue resistance. A high NA of 0.37 allows greater coupling efficiencies, while making these fibers optimal for applications requiring tight bending or coiling of fibers.
Their typical applications include medical, industrial and avionic sensors and instruments. The operating temperature of bare fibers ranges from -65°C to +125°C.
Cabled multimode fibers having a 900 µm outer jacket, surrounded by an Aramid yarn layer and a 3 mm diameter polyurethane cable jacket, provide additional strength and environmental protection. The cabled fibers have an operating temperature of -40°C to +85°C, and are identified by the -C suffix in their model number.
High-temperature, all-silica, high OH-sensor grade fibers are available in 100 and 200 µm core diameters for use in harsher environments. Featuring a polyimide buffer coating, the fibers’ upper operating range is extended to +375°C, while its chemical and abrasion resistance is increased.
Typical applications for these fibers include medical and ...


Bare Fiber Ordering Information (No Termination)
The following volume discount schedule is automatically applied when ordering: 6 - 30 m with 15 %, 31- 500 m with 22 %, >500 m with 25 %
 Quantity (m) Model Description Price (1-25m)
  F-MBB Multimode Fiber, Step Index, 500-1100nm, 0.37 NA, 200µm Core, 230µm Cladding 
  F-MBB-C Multimode Fiber, Step Index, 500-1100nm, 0.37 NA, 200µm Core, 230µm Clad, Cabled 
  F-MBC Multimode Fiber, Step Index, 500-1100nm, 0.37 NA, 400µm Core, 430µm Cladding 
  F-MBD Multimode Fiber, Step Index, 500-1100nm, 0.37 NA, 600µm Core, 630µm Cladding 
  F-MBE Multimode Fiber, Step Index, 500-1100nm, 0.37 NA, 1000µm Core, 1035µm Cladding 
  F-MCB-T Multimode Fiber, Step, High Temp, 250-1100nm, 0.22 NA, 100µm Core, 110µm Cladding 
  F-MCC-T Multimode Fiber, Step, High Temp, 250-1100nm, 0.22 NA, 200µm Core, 220µm Cladding 


Patchcord Ordering Table
 Quantity Model Description Price
  F-MBB-C-1SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 1m, SMA Connectors 
  F-MBB-C-2SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 2m, SMA Connectors 
  F-MBB-C-3SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 3m, SMA Connectors 
  F-MBB-C-5SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 5m, SMA Connectors 
  F-MBB-C-10SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 10m, SMA Connectors 
  F-MBB-C-1FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 1m, FC Connectors 
  F-MBB-C-2FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 2m, FC Connectors 
  F-MBB-C-3FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 3m, FC Connectors 
  F-MBB-C-10FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBB-C, 10m, FC Connectors 
  F-MBB-C-1SMA-FC Multimode Step Index Hybrid Patch Cord, 500-1100nm, F-MBB-C, 1m, SMA to FC Connector 
  F-MCB-T-1SMA Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCB-T, 1m, SMA Connectors 
  F-MCB-T-3SMA Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCB-T, 3m, SMA Connectors 
  F-MCB-T-1FC Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCB-T, 1m, FC Connectors 
  F-MCB-T-3FC Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCB-T, 3m, FC Connectors 
  F-MCC-T-1SMA Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCC-T, 1m, SMA Connectors 
  F-MCC-T-2SMA Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCC-T, 2m, SMA Connectors 
  F-MCC-T-5SMA Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCC-T, 5m, SMA Connectors 
  F-MCC-T-1FC Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCC-T, 1m, FC Connectors 
  F-MCC-T-5FC Multimode Step Index Patch Cord, High Temp, 250-1100nm, F-MCC-T, 5m, FC Connectors 
  F-MBC-C-1SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBC-C, 1m, SMA Connectors 
  F-MBC-C-2SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBC-C, 2m, SMA Connectors 
  F-MBC-C-3FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBC-C, 3m, FC Connectors 
  F-MBD-1SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBD, 1m, SMA Connectors 
  F-MBD-1SMA-FC Multimode Step Index Hybrid Patch Cord, 500-1100nm, F-MBD, 1m, SMA to FC Connector 
  F-MBD-3FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBD, 3m, FC Connectors 
  F-MBD-5FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBD, 5m, FC Connectors 
  F-MBE-1SMA Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBE, 1m, SMA Connectors 
  F-MBE-3FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBE, 3m, FC Connectors 
  F-MBE-5FC Multimode Step Index Fiber Patch Cord, 500-1100nm, F-MBE, 5m, FC Connectors 


Custom Patchcord Ordering Information

Note: (1) The fiber jacket option is not available with all fiber types. The length is limited to 5 m.



For a custom patch cord, please use above part number. Depending on the fiber type, only certain connectors will be available. Some fibers are not offered for customization. Please check with a Newport sales engineer (1-800-222-6440 or tech@newport.com).

For more detailed information on ordering fibers, see .Optical Fiber Ordering Information
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