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Fingerprint Dive into the research topics where Walter Johnstone is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

Physics & Astronomy

Aerospace Sciences

laser spectroscopy
spectroscopy
plumes
photoacoustic spectroscopy
gas spectroscopy

Engineering

diodes
semiconductor lasers
optical communication
engines
microelectromechanical systems
solid oxide fuel cells
delay lines
retroreflectors
free-space optical communication
laser applications
code division multiple access
gas turbine engines
fiber lasers

Physics

modulation
wavelengths
optical fibers
harmonics
elimination
Fresnel lenses
fiber optics
temperature
frequency modulation
phase shift keying

Chemistry and Materials

gases
methane
water vapor
acetylene
natural gas

General

line shape
recovery
lasers
amplifiers
sensors
gas composition
light amplifiers
decomposition
fibers
cells
output
modulators
industries
inspection
actuation
transmitters

Mathematical and Computer Sciences

sensitivity

Engineering & Materials Science

Laser spectroscopy
Semiconductor lasers
Gases
Modulation
Methane
Wavelength
Spectroscopy
Photoacoustic effect
Solid oxide fuel cells (SOFC)
Sensors
Amplitude modulation
Lasers
Engines
Distributed feedback lasers
Fiber optic sensors
Optical fibers
Light sources
Photoacoustic spectroscopy
Fiber optic networks
Infrared radiation
Aerospace applications
Process control
Monitoring
Chemical sensors
Gas fuel measurement
Fiber lasers
Calibration
Exhaust systems (engine)
Recovery
Imaging techniques
Gas absorption
Fiber optics
Fiber amplifiers
Water vapor
Tomography
Bypass ratio
Semiconductor optical amplifiers
Fibers
Optical communication
Hydrocarbons
Gas turbines
Transmitters
Bit error rate
Code division multiple access
Modulators
Testing
Industrial applications
MEMS
Carbon dioxide
Hazardous materials spills