Time-division multiplexing exploiting low-coherence interferometry with a multimode laser diode source

1992 ◽  
Author(s):  
Jose L. Santos ◽  
David A. Jackson
Keyword(s):  
Laser Diode ◽  
Time Division Multiplexing ◽  
Multimode Laser ◽  
Low Coherence ◽  
Low Coherence Interferometry ◽  
Time Division ◽  
Multimode Laser Diode

Development of the Terahertz Inspection Technology using Multimode Laser Diode

2013 ◽  
Vol 133 (8) ◽  
pp. 430-435 ◽  
Author(s):  
Tohru Takanaka ◽  
Hiroyuki Nishikawa ◽  
Yoshito Sameda ◽  
Keiji Yamamoto
Keyword(s):  
Laser Diode ◽  
Multimode Laser ◽  
Multimode Laser Diode

scholarly journals Development of a Long Period Fiber Grating Interrogation System Using a Multimode Laser Diode

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 749
Author(s):  
Luís Henrique Silva ◽  
Paulo Santos ◽  
Luís C. C. Coelho ◽  
Pedro Jorge ◽  
José Manuel Baptista
Keyword(s):  
Laser Diode ◽  
Measurement Errors ◽  
Laser Scanning ◽  
Fiber Grating ◽  
Light Sources ◽  
Fiber Gratings ◽  
Multimode Laser ◽  
Central Wavelength ◽  
Long Period ◽  
Multimode Laser Diode

Optical fiber gratings have long shown their sensing capabilities. One of the main challenges, however, is the interrogation method applied, since typical systems tend to use broadband light sources with optical spectrum analyzers, laser scanning units or CCD (Charged Coupled Device) spectrometers. The following paper presents the development of an interrogation system, which explores the temperature response of a multimode laser diode, in order to interrogate long period fiber gratings. By performing a spectral sweep along one of its rejection bands, a discrete attenuation spectrum is created. Through a curve fitting technique, the original spectrum is restored. The built unit, while presenting a substantially reduced cost compared with typical interrogation systems, is capable of interrogating along a 10 nm window with measurement errors reaching minimum values as low as 0.4 nm, regarding the grating central wavelength, and 0.4 dB for its attenuation. Given its low cost and reduced dimensions, the developed system shows potential for slow-changing field applications.

Characteristics of a multimode laser diode source in several types of dual-interferometer configuration

1991 ◽  
Author(s):  
Yanong N. Ning ◽  
Kenneth T. V. Grattan ◽  
Andrew W. Palmer ◽  
B. T. Meggitt
Keyword(s):  
Laser Diode ◽  
Multimode Laser ◽  
Multimode Laser Diode

Generation of Microwave Signals by Optical Heterodyning Technique Using a Multimode Laser Diode and a Tunable DFB Laser

2021 ◽  
Author(s):  
Blaise Tshibangu-Mbuebue ◽  
Min Won Lee ◽  
Roberto Rojas-Laguna ◽  
Ignacio Enrique Zaldivar-Huerta
Keyword(s):  
Laser Diode ◽  
Multimode Laser ◽  
Microwave Signals ◽  
Dfb Laser ◽  
Multimode Laser Diode

Compact and inexpensive continuous-wave subterahertz imaging system with a fiber-coupled multimode laser diode

2007 ◽  
Vol 90 (16) ◽  
pp. 161127 ◽  
Author(s):  
Kyoji Shibuya ◽  
Masahiko Tani ◽  
Masanori Hangyo ◽  
Osamu Morikawa ◽  
Hirofumi Kan
Keyword(s):  
Laser Diode ◽  
Continuous Wave ◽  
Imaging System ◽  
Multimode Laser ◽  
Multimode Laser Diode
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