Thorlabs MFA100S2111 Mode Field Adapter

Product Overview
The Thorlabs MFA100S2111 Mode Field Adapter is designed to efficiently expand the mode field of a single-mode optical fiber to match the LP01 mode of a larger large-mode-area (LMA) fiber. This bidirectional device is ideal for applications requiring low-loss splicing between fibers with differing mode field diameters, such as in high-power fiber lasers and amplifiers.

Key Specifications

• Input Fiber: SM100 fiber with a mode field diameter (MFD) of 6.6 µm and a numerical aperture (NA) of 0.12
• Output Fiber: LMA-GDF-20/400-M fiber with an MFD of 13 µm and an NA of 0.06
• Insertion Loss: Typically <0.5 dB
• Polarization Extinction Ratio (PER): >20 dB
• Operating Wavelength Range: 980 nm to 1080 nm

Key Features

• Precision Mode Field Expansion: Ensures optimal coupling efficiency between fibers with differing MFDs, minimizing splice losses.
• Bidirectional Operation: Allows for both expansion and compression of the mode field, providing flexibility in system design.
• High Polarization Maintenance: Maintains a high PER, essential for applications sensitive to polarization changes.
• Low Insertion Loss: Typical insertion loss of less than 0.5 dB ensures minimal signal attenuation.
• Robust Construction: Manufactured using Vytran® GPX glass processing technology, ensuring durability and reliability.

Conclusion
The Thorlabs MFA100S2111 Mode Field Adapter is an essential tool for professionals seeking efficient and reliable coupling between fibers with differing mode field diameters. Its precision design and low insertion loss make it invaluable for applications in high-power fiber lasers, amplifiers, and other photonics systems requiring optimal performance.