Graphdiyne-Based All-Solid-State Passively Q-Switched Tm:YAP Laser at 2 μm

Area of Science:

• Optoelectronics
• Laser Physics
• Materials Science

Background:

• All-solid-state Thulium (Tm) lasers offer advantages in wavelength range and output power.
• Saturable absorbers are crucial for passively Q-switched (PQS) laser operation.
• Graphdiyne (GDY) is an emerging optical nonlinear material with potential applications.

Purpose of the Study:

• To investigate the performance of graphdiyne (GDY) as a saturable absorber in an all-solid-state Tm:YAP laser.
• To achieve high repetition frequency and short pulse duration using GDY in a PQS laser system.
• To demonstrate the nonlinear optical properties of GDY for optoelectronic applications.

Main Methods:

• Synthesis of graphdiyne (GDY) via a cross-coupling method.
• Integration of GDY as a saturable absorber into a Tm:YAP laser cavity.
• Characterization of laser performance, including pulse duration, repetition frequency, and central wavelength.

Main Results:

• Successful implementation of GDY as a saturable absorber in a Tm:YAP laser.
• Achieved a shortest pulse duration of approximately 785 ns.
• Obtained a repetition frequency of approximately 199.6 kHz at a central wavelength of 1985.8 nm.
• Demonstrated the shortest pulse duration and highest repetition frequency for GDY in a solid-state Tm laser to date.

Conclusions:

• Graphdiyne (GDY) exhibits excellent nonlinear optical properties suitable for saturable absorbers.
• The developed GDY-based PQS Tm:YAP laser shows significant advancements in pulse duration and repetition frequency.
• GDY holds considerable promise for future optoelectronic devices and laser technologies.