Project Description

Mode Field Adaptor

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 fiber 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.

Features Applications
·         Low Insertion Loss

·         High Power Handling

·         Custom Configurations Available

 ·         Fiber Lasers

·         Fiber Amplifiers

General Configuration for Forward PM MFA:

Working Wavelength(nm) Signal Input Fiber Signal Output Fiber Signal Insertion Loss (dB) Max. Power Handling
1530~1570 PM1550 Panda PM-GDF-1550 ≤0.5 30W
1530~1570 PM-GDF-1550 PM 12/130µm,NA0.20/0.46 ≤0.5 30W
1530~1570 PM 12/130µm,NA0.20/0.46 PM 25/300µm,NA0.09/0.46 ≤0.5 30W

General Configuration for Backward PM MFA:

Working Wavelength(nm) Signal Input Fiber Signal Output Fiber Signal Insertion Loss (dB) Max. Power Handling
1530~1570 PM-GDF-1550 PM1550 Panda ≤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 ≤0.5 30W

Remark:

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

Package Information

Package Type T1 T3 T4
Dimensions (mm) Ф4.0×64 70x13x8 65x12x7.5

*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.

*Device package must be mounted onto heat sink (active cooling is suggested)with thermal paste for high power.

Order information   P/N: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
55:1550nm F:Forward

B:Backward

 05:5W

10:10W

25:25W

XX:Other

 XXX(fiber name) XXX(fiber name) 08:0.8m(default)

10:1.0m

20:2.0m

Part Number Example:  PMMFA-55-F-10- PM1550-PMGDF1550-10

Description: 1550nm PM Mode Field Adaptor, Forward, Max. 10W power handling , PM1550 panda input signal fiber, PM-GDF-1550 output fiber, 1.0m fiber length.

Ordering Information For Custom Parts

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

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