Efficient scheme for mid-infrared generation using simultaneous optical parametric oscillators and DFG processes in a...

Area of Science:

• Nonlinear Optics
• Quantum Optics
• Materials Science

Background:

• Mid-infrared (mid-IR) generation is crucial for various applications, including spectroscopy and sensing.
• Simultaneous optical parametric oscillators (OPO) and difference-frequency generation (DFG) offer a pathway to efficient mid-IR light production.
• Achieving efficient mid-IR generation often requires optimized cavity designs and nonlinear materials.

Purpose of the Study:

• To present numerical results of an efficient scheme for mid-infrared generation.
• To investigate a simultaneous quasi-phase matched OPO and DFG process in a singly resonant cavity with a double-pass pump configuration.
• To identify optimum parameters for maximizing conversion efficiency in the proposed cavity design.

Main Methods:

• Numerical simulation of a double-pass pump singly resonant (DPSR) cavity configuration.
• Utilizing quasi-phase matched optical parametric oscillators (OPO) and difference-frequency generation (DFG) processes.
• Employing MgO doped congruent lithium niobate with an appropriately poled grating structure.

Main Results:

• Demonstrated the feasibility of a DPSR cavity for simultaneous OPO+DFG processes, distinct from cascaded interaction schemes.
• Achieved efficient mid-infrared generation through the proposed configuration.
• Numerical results show agreement with recently reported experimental outcomes.
• Identified optimum parameters for the DPSR cavity to achieve maximum conversion efficiency.

Conclusions:

• The DPSR cavity configuration enables efficient simultaneous OPO and DFG for mid-IR generation.
• The proposed scheme offers an effective alternative to cascaded interaction methods.
• The study provides valuable insights into optimizing parameters for enhanced mid-IR output.