Results 81 to 90 of about 27,403 (301)
Wide-bandwidth mode-hop-free tuning of extended-cavity GaN diode lasers
, 2005 We present a new approach for extended-cavity diode-laser tuning to achieve wide mode-hop-free tuning ranges. By using a multiple piezoactuated grating mount, the cavity length and grating angle in the laser can be adjusted independently, allowing mode ...
Burns, I.S., Kaminski, C.F., Hult, J.
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Wave-mixing analysis for THz-signals generation in dc-biased semiconductor optical devices at room temperature [PDF]
, 2010 Wave-mixing at 370-GHz in a SOA and FP semiconductor laser is investigated by using a FROG-system. A comparison of the optical time-fluctuations measured at their output stresses the importance of a resonant cavity in THz-signals generation from ...
Frederic Surre +7 more
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Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes
Advanced Functional Materials, EarlyView.Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita +6 more
wiley +1 more source
Improved Beam Quality of Coherently Combined Angled-Grating Broad-Area Lasers
IEEE Photonics Journal, 2013 We improve the beam quality and performance of coherently combined angled-grating broad-area lasers through current/gain confinement. We show that the nonuniform current/gain distribution in our previous lasers excites the second-order Bragg mode and ...
Yunsong Zhao, Lin Zhu
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Ultrashort-pulse generation from quantum-dot semiconductor diode lasers
, 2008 In this thesis, novel regimes of mode locking in quantum dot semiconductor laser diodes have been investigated by exploiting the unique features offered by quantum dots.
Cataluna, Maria Ana
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, 2014 This work was supported by the US National Science Foundation (ECCS- 1101947), National Institutes of Health (P41EB015903, R21EB013761), Department of Defense (FA9550-11-1-0331), and the Korea National Research Foundation (R31-2008-000-10071-0).
Gather, Malte Christian, Yun, Seok Hyun
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Mid-infrared frequency combs based on semiconductor lasers
, 2021 Frequency combs are ideal candidates to realize miniaturized spectrometers without moving parts and hence are of great interest for integrated photonics.
Strasser, Gottfried +9 more
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Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers
Advanced Functional Materials, EarlyView.We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar +6 more
wiley +1 more source
Modulator-free quadrature amplitude modulation signal synthesis
, 2014 The ability to generate high-speed on-off-keyed telecommunication signals by directly modulating a semiconductor laser’s drive current was one of the most exciting prospective applications of the nascent field of laser technology throughout the 1960s ...
Kelly, Brian +6 more
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Integration of Dye Lasers and Microfluidics for Biochemical Analysis [PDF]
, 2009 This dissertation describes the study of two important aspects of integration in microfluidics: optics and biochemistry. In optics integration, two types of miniaturized dye lasers, namely the solid-state polymer dye lasers and optofluidic dye lasers ...
Chen, Yan
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