Wide-range tunable dual-wavelength semiconductor laser using asymmetric dual quantum wells

1998 ◽  
Vol 10 (9) ◽  
pp. 1208-1210 ◽  
Author(s):  
Ching-Fuh Lin ◽  
Miin-Jang Chen ◽  
Bor-Lin Lee
Keyword(s):  
Quantum Wells ◽  
Semiconductor Laser ◽  
Dual Wavelength ◽  
Wide Range ◽  
Dual Quantum

scholarly journals 174-nm Mode Spacing in Dual-Wavelength Semiconductor Laser Using Nonidentical InGaAsP Quantum Wells

2004 ◽  
Vol 16 (2) ◽  
pp. 371-373 ◽  
Author(s):  
C.-C. Huang ◽  
C.-H. Cheng ◽  
Y.-S. Su ◽  
C.-F. Lin
Keyword(s):  
Quantum Wells ◽  
Semiconductor Laser ◽  
Dual Wavelength ◽  
Mode Spacing

Novel Dual Wavelength Electro-Optical Bistability in InGaAs/AlGaAs Multiple Quantum Wells

1992 ◽  
Vol 31 (Part 2, No. 3B) ◽  
pp. L313-L315 ◽  
Author(s):  
Stephen Giugni ◽  
Kenji Kawashima ◽  
Kenzo Fujiwara ◽  
Naokatsu Sano
Keyword(s):  
Quantum Wells ◽  
Optical Bistability ◽  
Dual Wavelength ◽  
Multiple Quantum Wells ◽  
Multiple Quantum

scholarly journals Spectral and spatial information from a novel dual-wavelength full-waveform terrestrial laser scanner for forest ecology

2018 ◽  
Vol 8 (2) ◽  
pp. 20170049 ◽  
Author(s):  
F. Mark Danson ◽  
Fadal Sasse ◽  
Lucy A. Schofield
Keyword(s):  
Field Experiments ◽  
Forest Ecology ◽  
Laser Scanner ◽  
Dual Wavelength ◽  
Leaf Biomass ◽  
Terrestrial Laser Scanner ◽  
Area Index ◽  
Waveform Data ◽  
Full Waveform ◽  
Wide Range

The Salford Advanced Laser Canopy Analyser (SALCA) is an experimental terrestrial laser scanner designed and built specifically to measure the structural and biophysical properties of forest canopies. SALCA is a pulsed dual-wavelength instrument with co-aligned laser beams recording backscattered energy at 1063 and 1545 nm; it records full-waveform data by sampling the backscattered energy at 1 GHz giving a range resolution of 150 mm. The finest angular sampling resolution is 1 mrad and around 9 million waveforms are recorded over a hemisphere above the tripod-mounted scanner in around 110 min. Starting in 2010, data pre-processing and calibration approaches, data analysis and information extraction methods were developed and a wide range of field experiments conducted. The overall objective is to exploit the spatial, spectral and temporal characteristics of the data to produce ecologically useful information on forest and woodland canopies including leaf area index, plant area volume density and leaf biomass, and to explore the potential for tree species identification and classification. This paper outlines the key challenges in instrument development, highlights the potential applications for providing new data for forest ecology, and describes new avenues for exploring information-rich data from the next generation of terrestrial laser scanners instruments like SALCA.

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