Related Experiment Video
Updated: Jun 11, 2026
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Tunable 3.75-4.35 µm optical parametric generation using cascaded non-critical phase matching in CdSiP2
Applied Optics
|June 10, 2026
Summary
This study presents a tunable mid-wave infrared radiation source using cascaded optical parametric generation in Cadmium Silicon Phosphide (CdSiP2). The system achieves wavelength tuning from 3.75 to 4.35 µm, ideal for atmospheric transmission.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Mid-wave infrared (MWIR) radiation is crucial for various applications, including spectroscopy and remote sensing.
- Developing efficient and tunable MWIR sources remains a significant challenge in photonics.
Purpose of the Study:
- To demonstrate a novel cascaded optical parametric generation (OPG) architecture.
- To produce tunable MWIR radiation within the first atmospheric transmission window.
- To utilize Cadmium Silicon Phosphide (CdSiP2) for efficient OPG.
Main Methods:
- Implementation of a cascaded OPG system utilizing type-I non-critical phase matching (NCPM) in CdSiP2 crystals.
- Employing two Nd:YAG pump lasers (10 Hz flashlamp-pumped and 1 kHz diode-pumped) for OPG.
- Utilizing temperature tuning of the second CdSiP2 stage with orthogonal crystal axes for wavelength control.
Main Results:
- Generation of tunable MWIR radiation from 3.75 to 4.35 µm.
- Achieved output energies of up to 108 µJ (10 Hz system) and 17 µJ (1 kHz system) at 3.75 µm.
- Demonstrated continuous wavelength tuning through temperature control of the CdSiP2 crystals.
Conclusions:
- The developed cascaded OPG architecture in CdSiP2 is effective for generating tunable MWIR radiation.
- The system operates within a key atmospheric transmission window, making it suitable for practical applications.
- The use of NCPM in CdSiP2 offers an efficient route for MWIR generation.
