by National Aeronautics and Space Administration, Scientific and Technical Information Office, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English
|Statement||I. Ladany, C. J. Nuese, and H. Kressel, RCA Laboratories ; prepared for Langley Research Center.|
|Series||NASA contractor report ; 3045, NASA contractor report -- NASA CR-3045.|
|Contributions||Nuese, C. J., Kressel, Henry., United States. National Aeronautics and Space Administration. Scientific and Technical Information Office., RCA Laboratories.|
|The Physical Object|
|Pagination||xii, 112 p. :|
|Number of Pages||112|
An experimental and theoretical study of the effect of stripe width on the threshold current was carried out. Emission below A was obtained in VPE grown Ga(AsP) (In,Ga)P with CW operation at 10 C. Lasers and LED's were made by LPE in (InGa) (AsP). Laser thresholds of 5 kA/cm2 were obtained, while LED efficiences were on the order of 2%. High Peak Power, Pulsed Operation Laser Diodes Fiber Concepts Relevant to Optical Communications Near-Infrared CW Laser Diodes of (AlGa)As High Radiance Light-Emitting Diodes Visible Emission Laser Diodes General Purpose Heterojunction LEDs References Chapter 15 Distributed-Feedback Lasers IntroductionBook Edition: 1. Semiconductor Lasers and Light Emitting Diodes 12/22 For a µm long semiconductor laser and an effective index of , the spacing of longitudinal modes is about GHz. The wavelength spacing of the longitudinal modes varies slowly, and if the laser operates at approximately nm, the longitudinal modes are separated by about Size: KB. 4 1 Lasers: Fundamentals, Types, and Operations N N E 0 E E 1 E 3 E 0 E E 1 2 Fast decay Fast decay Fast decay Pumping Pumping Lasing Lasing (a) (b) Figure Energy level diagram for (a) three- and (b) four level laser systems. N 1 to achieve the condition of population inversion between E 2 and E 1 at moderate pumping. Threshold Gain Coefﬁcient for Lasing Laser File Size: KB.
ELSEVIER Optics Communications () 15 April OPTICS COMMUNICATIONS Frequency control of DBR diode lasers at micrometer and precision spectroscopy of helium M. Prevedelli a, P Cancio b, G. Giusfredi ', F.S. Pavone b, M. Inguscio a Dipartimento di Fisica dell'Universiul di Firenze, Firenze, Italy ^ European Laboratory Cited by: Chapter Short-Wavelength Semiconductor Diode Lasers Overview Convenience dictates that the broad field of semiconductor lasers be broken up into manageable chunks, and it seems logical to group together those with wavelengths shorter than about micrometers . 4. SEMICONDUCTOR DIODE LASERS* Introduction Semiconductor lasers cover a spectral range extending from the far infrared ( pm) to the visible ( pm). However, because some interesting semiconductors cannot be doped both n- and p-type, only part of the range is attainable with p-n junction injection : Henry Kressel. Chapter 11 Basics of Semiconductor Lasers Introduction Introduction to Semiconductor Lasers: In semiconductor optical amplifiers (SOAs), photons multiplied via stimulated emission. In SOAs photons were confined in the dimensions transverse to the waveguide but were allowed to escape from theFile Size: KB.
Abstract. Oct. Contract NAS Includes bibliographical of access: Internet. Charles J. Nuese. RCA Labs. Contact. The micrometer and visible emission semiconductor diode lasers. The 1. 1 micrometer and visible emission semiconductor diode lasers. Final. Semiconductor lasers have important applications in numerous fields, including engineering, biology, chemistry and medicine. They form the backbone of the optical telecommunications infrastructure supporting the internet, and are used in information storage devices, bar-code scanners, laser printers and many other everyday products. Laser structure and principle of operation Laser diodes consist of a -n diode with an active region where electrons and holes recombine p resulting in light emission. In addition, a laser diode contains an optical cavity where stimulated emission takes place. The laser cavity consists of a waveguide terminated on each end by a Size: 83KB.