Tag Archives: Quantum West

Multiwavelength narrow linewidth laser system for Ba+ quantum computing applications

Published in: QUANTUM WEST SPIE 2024 Authors: Kostiantyn Nechay, Luukas Kuusela, Pekko Sipilä, Kalle Palomäki, Petteri Uusimaa  Published in: QUANTUM WEST SPIE 2024 Authors: Kostiantyn Nechay, Luukas Kuusela, Pekko Sipilä, Kalle Palomäki, Petteri Uusimaa Quantum information processing (QIP) approach based on trapped ions is a promising technology that exploits different ion species as individual qubits and qubit gates, while featuring long coherence times, high fidelity of operations, fast readout, and ion-ion gate entanglement. The practical usefulness of trapped-ion quantum computer depends on its further scaling to a large number of qubits. Meanwhile, trapped-ion quantum computer relies on a set of single-frequency lasers, utilizing Continue reading →

Narrow linewidth 650 nm DBR laser diode for quantum applications

Published in: QUANTUM WEST SPIE 2024 Authors: Riina Ulkuniemi, Luukas Kuusela, Mika Mähönen, Timo Aho, Jussi Hämelahti, Andreas Schramm, Soile Talmila, Pekko Sipilä, Petteri Uusimaa  Published in: QUANTUM WEST SPIE 2024 Authors: Riina Ulkuniemi, Luukas Kuusela, Mika Mähönen, Timo Aho, Jussi Hämelahti, Andreas Schramm, Soile Talmila, Pekko Sipilä, Petteri Uusimaa Laser systems are utilized in quantum for various applications. Multiple wavelengths and tailored solutions are required depending on the technology that the laser will be applied to. For instance, lasers can be used for controlling particles and molecules, including excitations of the quantum systems. Key performance requirements for lasers used in these applications include narrow linewidth, frequency stability, and single-frequency Continue reading →

Configurable multiwavelength narrow linewidth laser system for quantum applications

Presented in: SPIE Quantum West 2023 Authors: Kostiantyn Nechay, Luukas Kuusela, Ossi Mäkinen, Riina Ulkuniemi, Pekko Sipilä, Kalle Palomäki, Petteri Uusimaa    Presented in: SPIE Quantum West 2023 Authors: Kostiantyn Nechay, Luukas Kuusela, Ossi Mäkinen, Riina Ulkuniemi, Pekko Sipilä, Kalle Palomäki, Petteri Uusimaa   Single-frequency laser sources serve as a backbone for quantum computing and metrology technologies and applications. Availability of integrated laser systems delivering tailored multiwavelength emission across optical spectrum is a defining factor for further quantum technologies development and commercialization. Modulight demonstrates highly integrated ML6600 laser system for cooling and repumping of 87Rb atoms at D2 line. Such laser system incorporates driving electronics, internal spectroscopy-locked Continue reading →

Optimization and fabrication of 780 nm DFB lasers for quantum systems

Presented in: SPIE Quantum West 2023 Authors: Riina Ulkuniemi, Luukas Kuusela, Timo Aho, Petteri Uusimaa    Presented in: SPIE Quantum West 2023 Authors: Riina Ulkuniemi, Luukas Kuusela, Timo Aho, Petteri Uusimaa   Laser diode solutions for quantum systems have highly variable requirements, depending on the technology and purpose of the laser used in the application – for instance, quantum control of particles or molecules and excitation of the quantum systems. Requirements of the laser systems used in the mentioned applications are highly demanding, such as single-mode operation, frequency stability over operation lifetime and narrow spectral linewidth. Narrow spectral linewidth can be achieved with Continue reading →

High aspect ratio DBR gratings for narrow linewidth red lasers

Presented in: SPIE Quantum West 2023 Authors: Luukas Kuusela, Riina Ulkuniemi, Timo Aho, Petteri Uusimaa    Presented in: SPIE Quantum West 2023 Authors: Luukas Kuusela, Riina Ulkuniemi, Timo Aho, Petteri Uusimaa   In interferometry, spectroscopy, and holography, HeNe lasers or semiconductor lasers with external wavelength stabilization have been widely used to achieve the required narrow linewidth at 633 nm. Semiconductor lasers utilizing wavelength selective grating fabricated on semiconductor chip enable the miniaturization of laser systems while also providing numerous advantages such as low energy consumption, reliability and tunability by temperature and injection current. Moreover, DBR gratings reduce the complexity of the laser system compared Continue reading →