Self-injection-locked thin-film regenerative laser amplifier

Area of Science:

• Optoelectronics
• Materials Science

Background:

• Organic lasers with distributed feedback (DFB) microcavities are widely studied.
• Limitations include low output power and high beam divergence, hindering practical applications.

Purpose of the Study:

• To develop laser amplifiers for organic DFB microcavities to enhance output power and control lasing modes.
• To address the need for practically applicable laser intensity and far-field applications.

Main Methods:

• Integration of a DFB microcavity with a Bragg reflector, using a high-reflection mirror as the Bragg reflector.
• Utilizing external-cavity injection through feedback from the Bragg reflector.
• Achieving coherent coupling between the DFB microcavity and the Bragg amplifier.

Main Results:

• Demonstrated an amplification factor exceeding 20.
• Achieved a single output laser spot with high contrast.
• Confirmed high conversion efficiency and high-contrast transverse modes due to coherent coupling.

Conclusions:

• The developed self-injected DFB microcavity amplifier design enhances organic laser performance.
• This integration offers a pathway to high-performance thin-film laser sources for practical applications.