Universal Isolated Lasers via Photonic-Crystal Optical Resonator Nonlinearity

Octave Photonics, in partnership with NIST and the University of Colorado, aims to revolutionize integrated laser technology through the development of Universal Isolated Lasers via Photonic-Crystal Optical Resonator Nonlinearity (UNICORN). UNICORN seeks to address the growing demand for scalable, low-noise, isolated laser sources essential for quantum sensing applications. By leveraging nonlinear photonic-crystal-resonator technology, UNICORN will simplify the creation of narrow-linewidth lasers that resist undesirable optical feedback. The project combines cutting-edge photonic integrated circuit (PIC) designs with commercial off-the-shelf laser components, enabling a cost-effective and scalable solution for advanced laser production. The core innovation features patented photonic-crystal resonators and nonlinear nanophotonic circuits, utilizing self-injection locking, and the tantalum pentoxide material platform for enhanced nonlinearity, noise reduction, and passive non-magnetic isolation. The Phase 1 effort focuses on optimizing the PIC chip design for operation at 778 nm, crucial for rubidium-based quantum applications, and benchmarking performance through early experimental validations. This foundational work paves the way for developing functional prototypes in Phase 2, targeting rapid commercialization. UNICORN addresses critical technological barriers in quantum technologies, such as achieving narrow linewidths, and effective passive optical isolation without the need for bulky magnetic isolators. By integrating these capabilities within a compact, scalable platform, UNICORN will significantly enhance the manufacturability, portability, and performance of fieldable quantum technologies. The team includes leading experts from Octave Photonics and Dr. Scott Papp's group at the University of Colorado and NIST. Dr. Papp’s group brings many years of expertise in photonic integrated circuits, precision metrology, and optical atomic clocks. The team at Octave Photonics has a proven history of moving photonics innovations into practical commercial products, and well as extensive experience in nonlinear nanophotonics, and PIC design. Both teams have recently demonstrated the hybrid integration of commercial laser diodes with photonic integrated circuits.