110 nm versatile fiber optical parametric amplifier at 1.0 μm

Area of Science:

• Optics and Photonics
• Biomedical Optics
• Fiber Lasers and Amplifiers

Background:

• Fiber optical parametric amplifiers (FOPAs) are well-established in telecommunications, offering high gain and bandwidth.
• FOPAs at the 1.0 μm bio-favorable window remain underexploited, particularly concerning bandwidth limitations.

Purpose of the Study:

• To demonstrate an all-fiber single-pump FOPA at 1.0 μm with versatile performance characteristics.
• To showcase the practical application of this FOPA in enhancing sensitivity for optical imaging systems.

Main Methods:

• Development of an all-fiber single-pump FOPA configuration.
• Characterization of the FOPA's gain, bandwidth, and gain-spectrum flatness.
• Integration of the FOPA with a spectrally encoded microscopy system for signal amplification.

Main Results:

• Achieved ultrahigh gain of approximately 52 dB.
• Demonstrated a wide operational bandwidth of approximately 110 nm.
• Obtained good gain-spectrum flatness of approximately 3 dB.
• Showcased a sensitivity enhancement of 47 dB in spectrally encoded microscopy.

Conclusions:

• The developed all-fiber FOPA offers a promising solution for boosting sensitivity in optical systems operating at the 1.0 μm window.
• This versatile FOPA can serve as an effective add-on module for various 1.0 μm optical applications.
• The FOPA's performance highlights its potential for advancing bio-imaging and other sensing technologies.