300 mW 45 MHz fundamental mode-locking all-fiber ring Mamyshev oscillator at 1 µm

Area of Science:

• Optics and Photonics
• Fiber Lasers
• Ultrafast Optics

Background:

• Mamyshev oscillators (MOs) are mode-locked lasers known for their unique pulse shaping capabilities.
• Previous MO designs often involved complex setups or specialized components, limiting their practical applications.
• Achieving high repetition rates in fiber-based MOs is crucial for various applications, including telecommunications and material processing.

Purpose of the Study:

• To experimentally demonstrate a high repetition rate, all-fiber ring Mamyshev oscillator.
• To investigate the potential for achieving higher repetition rates using standard fiber components.
• To explore the impact of wavelength-division multiplexing (WDM) filtering on pulse duration.

Main Methods:

• An all-fiber ring cavity configuration was designed and implemented.
• Standard step-index fibers and optical components were utilized.
• Numerical simulations were performed to predict achievable repetition rates.
• WDM-type filtering was employed to analyze its effect on pulse characteristics.

Main Results:

• An experimental all-fiber ring Mamyshev oscillator was successfully demonstrated.
• The oscillator delivered 300 mW of optical power at a repetition rate of 45 MHz.
• Numerical design indicated that repetition rates exceeding 70 MHz are achievable.
• WDM-type filtering was shown to influence pulse duration.

Conclusions:

• The successful demonstration paves the way for simple and cost-effective all-standard-PM-fiber Mamyshev oscillators.
• The results highlight the potential for high repetition rate operation in fiber ring MOs.
• This work simplifies the construction of Mamyshev oscillators, making them more accessible.