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Conferences
This year our colleagues from the US and Japan are presenting at BiOS, Quantum West, and Photonics West conferences. In addition, our consultant Slawomir Piatek will be teaching a course on photodetectors. Please see links below for topics. Attendance at the conferences requires registration.
- Overview of mid-infrared technology for environmental gas analysis
- Single photon sources: theory, practice, and applications in quantum technologies
- Stay ready: Hamamatsu’s approach to ensuring robust and resilient supply chains
- C-axis determination of a uniaxial crystal with high-repeatability common-path heterodyne retardation measurement
- An external cavity nonlinear quantum cascade laser with high mid-infrared to terahertz conversion efficiency in the frequency of 1.2-4.5 THz tuning range
- Electrical flicker-noise analysis based on trapping and de-trapping model in quantum-cascade detectors
- Multi-spot polarization state encoded digital feedback system with phase-only spatial light modulators for cyber-physical laser processing system
- A novel design of a compact, freeform-based condenser lens for use with photomultiplier tubes to achieve high collection efficiencies
- Photodetectors: Theory, practice, and applications
Optical fibers and sensors for medical diagnostics, treatment and environmental applications XXIV | Conference 12835
Overview of mid-infrared technology for environmental gas analysis
Paper 12835-31 | January 28, 2024 @ 12:10 PM - 12:40 PM PST | Moscone Center, Room 311 (Level 3 South)
Abstract
There is a multibillion-dollar market for gas monitoring, and the demand for solutions continues to grow. Managing methane leaks is critical for energy operations, monitoring nitrogen species in agriculture has ramifications for crop health, and toxic gases in multiple industries can create hazardous working conditions. Many systems rely on optical techniques, light sources and photonic detectors working together to produce measurements. When considering the wavelengths to utilize, operating in the mid-infrared region presents advantages such as higher sensitivity, longer lifetimes, and more consistent measurements. Components have been known to be expensive and difficult to integrate, but recent developments present new opportunities. This presentation will cover the basic principles of photonic gas measurements, the state of current and future mid-infrared components, and the science behind the benefits of mid-infrared for gas analysis.
Presenter:
Gary Spingarn is a Product Manager with Hamamatsu focusing on detectors and light sources for the mid-infrared region. As a chemical engineer, Gary made his start in industrial gases where he gained hands-on experience in all sorts of processes such as steel mills, plastics manufacturing, and alternative energy. Photonic devices were key in many of his past projects, and he began with the spectrometer group before moving into mid-infrared components. Leveraging past experience, Gary continues to support the development of gas analyzers, analytical instruments, medical devices, pyrometers, and new applications.
Quantum computing, communication and stimulation IV | Conference 12911
Single photon sources: theory, practice, and applications in quantum technologies
Paper 12911-75 | January 31, 2024 @ 11:50 AM - 12:10 PM PST | Moscone Center, Room 153 (Upper Mezzanine South)
Abstract
Quantum technologies such as encryption, communication, computing, imaging, and metrology are active areas of research and development. A successful commercialization of these endeavors depends on availability of reliable, efficient, and cost-effective hardware in the form of single photon sources and photodetectors capable of photon number resolution. An ideal single photon source produces deterministically and efficiently indistinguishable photons, one (or two) at a time, at a desired rate and propagating in a chosen direction. Somewhat surprisingly, an attenuated laser does not meet all of these criteria, therefore, alternative sources need to be developed. A few decades of research yielded several sources that, although still not ideal, perform better than an attenuated laser. This presentation is a tutorial on these sources. It begins with a discussion why single photon sources are needed using examples from quantum encryption and imaging, and why an attenuated laser will not suffice. After reviewing physical characteristics of an ideal source, an in-depth and objective discussion of the major sources follows, in particular those based on spontaneous parametric down conversion, four wave mixing, quantum dot, color center, isolated system, and ensemble. The presentation ends with a brief discussion of generating entangled photon pairs and their use in quantum communication and imaging.
Presenter:
Slawomir S. Piatek, Ph.D., is a senior university lecturer on physics at the New Jersey Institute of Technology and a science consultant for Hamamatsu Corporation. At the university, he has been measuring the proper motions of nearby galaxies using images obtained by the Hubble Space Telescope. At Hamamatsu, he has developed a photonics training program for engineers. Piatek is also involved in popularizing the silicon photomultiplier (SiPM) as a novel photodetector by writing and lecturing, and by experimenting with the device. He earned a doctorate in physics from Rutgers, The State University of New Jersey, in 1994.
Quantum West Business Summit: Establishing robust supply chains and enabling volume manufacturing for quantum technologies
Stay ready: Hamamatsu’s approach to ensuring robust and resilient supply chains
January 31, 2024 @ 1:15 PM - 3:00 PM PST | Moscone Center, Room 156 (Upper Mezzanine South)
Abstract
Hamamatsu Photonics has been providing photonic solutions for over 70 years. This presentation will cover the approach Hamamatsu Photonics has formulated to ensure we can provide our customers a stable supply of our products, and the challenges to emerging markets.
Presenter:
Takaaki Otake is an Applications Engineer at Hamamatsu Corporation in Bridgewater, NJ. His expertise includes manufacturing process management, and he has over 4 years of experience in the photomultiplier tube (PMT) manufacturing group. He works closely with Hamamatsu’s Electron Tube Division (ETD) by bringing R&D from Japan together with researchers and early adopters in North America to provide a range of photonics solutions for the current and future quantum technologies landscape. He is active in the quantum community by managing activities in quantum hubs such as the Quantum Economic Development Consortium (QED-C). He received his master's degree in Material Physics from Saitama University in 2015.
Photonic Instrumentation Engineering XI | Conference 12893
C-axis determination of a uniaxial crystal with high-repeatability common-path heterodyne retardation measurement
Paper 12893-10 | January 29, 2024 @ 3:55 PM - 4:15 PM PST | Moscone Center, Room 312 (Level 3 South)
Abstract
We developed an ultra-precise retardation-measurement system based on optical-heterodyne interferometry with a 3σ repeatability of λ/390,000 for zero retardation, where the frequency shift for the optical-heterodyne interferometry was generated by a rotating half-waveplate, and both polarizations for retardation measurement were always exactly on the common path. Using this system, the direction of the c-axis of a sapphire window was determined by analyzing the incidence-angle dependence of the retardation. The possible resolution of the c-axis direction of our sample was estimated to be 0.9 arcmin from the retardation-measurement repeatability. This c-axis determination method will be applicable to, for example, high-precision sapphire-mirror production/evaluation for gravitational-wave detection.
Contributing authors: Yu Takiguchi, Kazuhiro Kanamura, Hiroshi Tanaka
Presenter:
Naoaki Kato is a researcher at Central Research Laboratory in Hamamatsu Photonics K.K. in Japan. He earned a B.Sc. (physics) degree at The University of Tokyo in 2018. His current research is about Liquid-Crystal-on-Silicon Spatial Light Modulators (LCOS-SLMs). He published a paper in Optics Express on simulation of a spectral-broadness-tunable Littman/Metcalf external cavity diode laser, whose tunability is enabled by an SLM. He is also interested in precise retardation (birefringence) measurements for evaluation of LCOS-SLMs and anisotropic optical crystals, and he has applied for a patent.
Quantum Sensing and Nano Electronics and Photonics XX | Conference 12895
An external cavity nonlinear quantum cascade laser with high mid-infrared to terahertz conversion efficiency in the frequency of 1.2-4.5 THz tuning range
Paper 12895-33 | January 30, 2024 @ 9:20 AM - 9:35 AM PST | Moscone Center, Room 2000 (Level 2 West)
Abstract
A broadly tunable THz nonlinear QCL with enhanced conversion efficiency by employing a homogeneous active region is demonstrated. Using an external cavity configuration, the device has achieved tunability from 1.2 THz to 4.5 THz in the operating frequency range. The single dual-upper-state structure with wide gain bandwidth and a high nonlinear susceptibility χ2 enables to realize two-wavelength oscillations without stacking active regions and significantly improves the mid-infrared to THz conversion efficiency, resulting in superior performance over previously reported frequency tunable devices. The device has achieved a conversion efficiency of ~3 mW/W2 around 3.5 THz. In the presentation, spectroscopic measurements using this device will also be reported.
Contributing authors: Atsushi Nakanishi, Tatsuo Dougakiuchi, Akio Ito, Masahiro Hitaka, Kazuue Fujita
Presenter:
Shohei Hayashi is a staff research scientist of Central Research Laboratories at Hamamatsu Photonics K.K., in Shizuoka, Japan. He received a master of engineering degree from Nagoya Institute of Technology (Nagoya, Japan) in 2012. In April 2012, he joined Hamamatsu Photonics K.K., where he was engaged in research on plasmonics, metasurface, and THz devices including quantum-cascade lasers. Hayashi is a member of the Japan Society of Applied Physics (JSAP).
Electrical flicker-noise analysis based on trapping and de-trapping model in quantum-cascade detectors
Paper 12895-34 | January 30, 2024 @ 9:35 AM - 9:50 AM PST | Moscone Center, Room 2000 (Level 2 West)
Abstract
The electrical flicker noise observed in QC detectors was investigated with experimental and theoretical approaches. In comparison with the experimental results, the theoretical predictions, which are based on fluctuating charge-dipoles caused by electron trappings and de-trappings at impurity states, show a qualitative agreement with the measured temperature and device size dependencies of the flicker noise. In order to achieve the best low-noise performance from QC detectors, it is important to understand how flicker noise behaves in QC detectors using the theoretical model that takes into account for the experimental results.
Contributing authors: Kazuue Fujita, Yutaka Kadoya
Presenter:
Tatsuo Dougakiuchi received his M.S. in electronic engineering degree from Hiroshima University (Hiroshima, Japan) in 2009. He joined Hamamatsu Photonics K.K., (Shizuoka, Japan) in April 2009, where his work currently focuses on the research and development of quantum cascade lasers and detectors including the design of their device structures, and their applications. He is a member of SPIE.
AI and Optical Data Sciences V | Conference 12903
Multi-spot polarization state encoded digital feedback system with phase-only spatial light modulators for cyber-physical laser processing system
Paper 12903-47 | January 31, 2024 @ 3:15 PM - 3:30 PM PST | Moscone Center, Room 151 (Upper Mezzanine South)
Abstract
The arbitrary dynamic control of both amplitude and polarization distributions is attracting strong interest in the laser processing field to manage the quality and to collect valuable polarization characteristics of processing materials in smart manufacturing. We present a holographic method to generate arbitrary polarization state of multiple beams by synchronizing two phase-only liquid crystal spatial light modulators (SLMs) with imaging feedback system for hologram designing of each polarization state. This research work will help to accelerate the use of liquid crystal SLMs for high-throughput and optimized additive manufacturing.
Contributing authors: Naoaki Kato, Keisuke Uchida, Tomoko Otsu-Hyodo, Kazuhiro Nakamura, Munenori Takumi, Hiroshi Tanaka, Haruyoshi Toyoda
Presenter:
Yu Takiguichi joined Hamamatsu Photonics K.K. (Japan) in 2007 as a research scientist at Central Research Laboratory. He received a master’s degree in ultra-high sensitivity absorption spectroscopy and a bachelor’s degree in radiation detection from Nagoya University, Japan. His research includes the development of liquid crystal on silicon – spatial light modulator (LCOS-SLM) and finding applications of such devices in biology and industry. In 2015-2016, he was a visiting scholar at the Laser Biomedical Research Center at the Massachusetts Institute of Technology. He received a doctor’s degree from Shizuoka University in 2018, and his dissertation was about pupil function modulation for temporal-spatio-dynamic point spread function
Optical Components and Materials XXI | Conference 12882
A novel design of a compact, freeform-based condenser lens for use with photomultiplier tubes to achieve high collection efficiencies
Paper 12882-47 | January 31, 2024 @ 3:40 PM - 4:00 PM PST | Moscone Center, Room 2012 (Level 2 West)
Abstract
In many application domains such as biomedical or optical communication, it is a continuous challenge to collect subtle amounts of light. In addition, miniaturization of the detector is also required in these applications. To solve the weak light collection problem, we have developed a freeform-based condenser lens with a wide entrance aperture and wide acceptance angle, which exhibits excellent performance in miniaturization and high-efficiency light collection. In this presentation, we will show the design and characteristics of this lens and its effectiveness when mounted on a photodetector.
Contributing authors: Suguru Matsumoto, Hirokazu Muramatsu, Yunfeng Nie, Heidi Ottevaere, Hugo Thienpont
Presenter:
Tomohiko Suzuki graduated from the University of Yamanashi with a Master of Engineering in 2007 and joined Hamamatsu Photonics K.K. upon his graduation. He has been engaged in the development of photosensor modules using photomultiplier tubes (PMTs). Since 2019, he has been developing optical systems for coupling with photosensors to further improve their performance.
Course:
Photodetectors: Theory, practice, and applications
Course SC1277 | January 28, 2024 8:30 AM - 12:30 PM PST
Abstract
Many new and trending photonics applications (PET for medical imaging, LiDAR for autonomous vehicles, flow cytometry for medical point-of-care) require the use of photodetectors. This course discusses the selection process of an optimal photodetector from a pool of four (photomultiplier tube, photodiode, avalanche photodiode, and silicon photomultiplier) using the WITS$ methodology. The approach is based on four fundamental properties of light − wavelength (W), intensity (I), temporal behavior (T), and spatial characteristics (S) − and cost ($). After reviewing the basic concepts of the detectors’ optoelectronic characteristics, operation, and noise, the course presents realistic case studies of the selection process for a wide range of experimental setups. Anyone who wants to answer questions such as, “Should I switch from PMT to SiPM?” or “What are the advantages and weaknesses of each photodetector technology?” will benefit from taking this course.
Instructor:
Slawomir S. Piatek, Ph.D., is a senior university lecturer on physics at the New Jersey Institute of Technology and a science consultant for Hamamatsu Corporation. At the university, he has been measuring the proper motions of nearby galaxies using images obtained by the Hubble Space Telescope. At Hamamatsu, he has developed a photonics training program for engineers. Piatek is also involved in popularizing the silicon photomultiplier (SiPM) as a novel photodetector by writing and lecturing, and by experimenting with the device. He earned a doctorate in physics from Rutgers, The State University of New Jersey, in 1994.
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