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CPS / Mode Field Adapter

Products

1.5um Mode Field Adaptor- Backward

Mode field is different in fibers with different core diameter and NA. Splicing loss is large between two fibers with different mode field. In order to reduce splicing loss, mode field must be similar. MFA can optimize splice loss significantly, usually <0.5dB, even <0.3dB between different fibers.

Features

  • Low Insertion Loss
  • High Power Handling
  • Custom Configurations Available

Applications

  • Fiber Lasers
  • Fiber Amplifiers
  • Lab/Production Testing
Mode field is different in fibers with different core diameter and NA. Splicing loss is large between two fibers with different mode field. In order to reduce splicing loss, mode field must be similar. MFA can optimize splice loss significantly, usually <0.5dB, even <0.3dB between different fibers.
Mode Field Adaptors is designed to makes two fibers to keep mode field diameter matched with low fundamental mode signal loss and minimal degradation of beam quality (M2). These devices can also be used to absorb residual pump light in the reverse direction, preventing damage to the seed or isolator.
Define small MFD fiber to large MFD fiber is F-Forward, large MFD to small MFD is B-Backward. Custom Mode Field Adaptors can be designed to meet a wide range of fiber types.

General Configuration for Backward MFA: 1.5μm

WORKING WAVELENGTH(NM) SIGNAL INPUT FIBER SIGNAL OUTPUT FIBER SIGNAL INSERTION LOSS (DB) MAX. POWER HANDLING
1530~1570 SM-GDF-1550/DCF-UN-8/125-14 SMF-28 ≤0.5 20W
1530~1570 12/130µm, NA0.20/0.46 SM-GDF-1550/DCF-UN-8/125-14 ≤0.5 20W
1530~1570 25/300µm, NA0.09/0.46 12/130µm, NA0.20/0.46 ≤0.7 20W
1530~1570 PM-GDF-1550 PM1550-XP ≤0.5 30W
1530~1570 PM 12/130µm, NA0.20/0.46 PM-GDF-1550 ≤0.5 30W
1530~1570 PM 25/300µm, NA0.09/0.46 PM 12/130µm, NA0.20/0.46 ≤0.7 30W

Remark:

  1. Other configuration and higher power handling can be customized.
  2. All MFA default with bare fiber, 0.8m length of pigtail, please contacts us for special request.
  3. The signal loss means the fundamental mode signal loss.
  4. ER≥18dB for PM fiber MFA.

Package Information

Package Type
P1
P2
P3
Dimensions (mm)
Ф4.0×60
65x12x7
80x12x8
  1. Due to ongoing design improvements, the package size is subject to change. According to the different configuration, power handling, and fiber core diameter, we will choose the appropriate package size. Please contact DK Photonics for confirmation.
  2. Device package must be mounted onto heat sink (active cooling is suggested) with thermal paste for high power.
Download Drawing in PDF:Pump and Signal Combiner

Order information

P/N: MFA (PMMFA)-A-B-C-D-E-F

When you inquire, please provide the correct P/N number according to our ordering information and attach the appropriate description would be better.
A
B
C
D
E
F
Working Wavelength
Direction
Power Handling
Input Fiber Type
Output Fiber Type
Fiber length
15:1550nm
F: Forward
B: Backward
05:5W
25:25W
50:50W
XX:Other
XXX (fiber code)
XXX (fiber code)
08:0.8m(default)
10:1.0m
20:2.0m
Part Number Example:  PMMFA-15-B-P15D-P15X-08

Description: 1550nm PM Mode Field Adaptor, Backward, Max. 10W power handling, PM-GDF-1550 input signal fiber, PM1550-XP output fiber, 0.8m fiber length.

Ordering Information for Custom Parts:

If you need to customize other specifications, please provide detailed description for your requirement.