Hamamatsu News 2-2016 - page 9

News 2016 Vol. 2 9
(from the left)
Atsushi Sugiyama
Development Center (in charge of QCL development)
Takahide Ochiai
Manuf. Group of Laser Group (in charge of QCL development)
Satoru Oishi
Business Planning & Development Dept. of Business Headquarters
(in charge of sales)
Masashi Asakura
Solid State Division, Manuf. #1 (in charge of InAsSb photovoltaic
detector development)
Daisuke Iida
Solid State Division, Manuf. #1 (in charge of InAsSb photovoltaic
detector development)
InAsSb photovoltaic detector
utilizing molecular absorption even in fluids and solids. For example,
there are plenty of possibilities for applications in areas that utilize
molecular absorption in moisture or cholesterol.
Please tell us about future directions for QCL and InAsSb
photovoltaic detector.
The QCL we currently provide covers a wavelength range of
4 μm to 10 μm, and we are working to further extend the wavelength
lineup. This means, of course, that we will also need a light sensor in
the vicinity of 10 μm to use it together with a QCL as a pair.
The InAsSb photovoltaic detector serving as the light sensor
currently covers the wavelength range from 2.5 μm to 8 μm. Using the
same technology for extending the wavelength range, we are planning
to extend the sensitivity to 11 μm and 12 μm.
Aiming at the long wavelength range around 10 μm, we will
provide both light sensors and light emitters, and in the future plan,
we will be developing modules consisting of a set of light sensor and
light emitter. We welcome any inquiry for measurements that use mid-
infrared light in this wavelength range.
R&D Interview
A broad range of applications for measurements
utilizing molecular absorption
How have customers reacted to these products?
Our customers are now evaluating the QCL and InAsSb
photovoltaic detector as a set of light emitter and sensor and
are gradually confirming the device performance. The absorption
wavelength range of the components contained in the gas is very
narrow, so this demonstrates the strong points of QCL that emits
light in a very narrow wavelength range. I think we can meet the
needs of manufacturers who want to produce equipment having
unique features.
The main point about optical measurement is that it
utilizes molecular absorption. This means that this method can be
applied to measure not just gas but also to a variety of applications
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