Showing 1-25 of 10,700 resultsfor "Index Terms":Laser tuning
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Monolithically Integrated Tunable Three- Section All-Active DBR Laser Diodes With 30 nm Tuning Range
We present a monolithically integrated three-section all-active AlGaInAs/InP tunable distributed Bragg reflector (DBR) ridge waveguide laser diode that uses thermal tuning mechanism and mode-hopping tuning principle to achieve wide-range wavelength tuning. It is similar to the traditional three-section DBR laser structure, including a gain section, a phase section, and a DBR grating section. The d...Show More
La-codoped bismuth-based erbium-doped fiber ring laser with 106-nm tuning range
IEEE Photonics Technology Letters
Cited by: Papers (19)
Ultrawide-band tunable fiber ring lasers using 84.6-cm-long lanthanum-codoped bismuth-based erbium doped fiber and a narrow-band tunable microelectromechanical system filter are reported. The fiber ring lasers can be continuously tuned from 1520 to 1626 nm, covering both the C- and L-bands. The laser has two outputs; the high output power port exhibits better than 35-dB wavelength extinction ratio...Show More
Wavelength-Tunable, GaSb-Based, Cascaded Type-I Quantum-Well Laser Emitting Over a Range of 300 nm
Nikolai B. Chichkov;Amit Yadav;Evgeny Zherebtsov;Meng Wang;Gela Kipshidze;Gregory Belenky;Leon Shterengas;Edik U. Rafailov
IEEE Photonics Technology Letters
Cited by: Papers (8)
We present a wavelength-tunable, external-cavity GaSb-based quantum-well laser operating near 3.2 μm. The laser setup consists of an intra-cavity grating in Littman-Metcalf configuration and a cascade pumped GaSb-based gain chip with a narrow-ridge waveguide. The narrow-ridge waveguide has a length of 2 mm and width of 7.5 μm. Cascade pumping is realized with three type-I quantum-wells, using one ...Show More
Watt-Level 100-nm Tunable 3- $\mu$m Fiber Laser
IEEE Photonics Technology Letters
Cited by: Papers (43)
Watt-level erbium-praseodymium codoped ZBLAN midinfrared fiber laser with 100-nm continuously wavelength-tunable range (2.7-2.8 m) is demonstrated. Continuous-wave output of 1 W with a linewidth of 1.8 GHz over the entire tuning range is affordable. Owing to relatively small residual populations in the lower laser level I of Er ions in the Er-Pr-codoped system, the wavelength-tunable range shrinki...Show More
Femtosecond 78-nm Tunable Er:Fibre Laser Based on Drop-Shaped Resonator Topology
Boris Nyushkov;Sergey Kobtsev;Aleksandr Antropov;Dmitry Kolker;Viktor Pivtsov
Journal of Lightwave Technology
Cited by: Papers (33)
We report for the first time on study of a passively mode-locked Er-doped fibre laser with ultra-wide tuning (from 1524 to 1602 nm) of the central wavelength of its femtosecond output (503-940 fs). The recently proposed drop-shaped cavity topology for fibre lasers enabled a compact widely tuneable femtosecond laser with a single discrete element, a reflective diffraction grating used for wavelengt...Show More
Multiwavelength pulse generation using an actively mode-locked erbium-doped fiber ring laser based on distributed dispersion cavity
IEEE Photonics Technology Letters
Cited by: Papers (30)
A simple design of a stable multiwavelength pulse generator was demonstrated using a dispersion-tuned actively mode-locked erbium-doped fiber (EDF) ring laser with distributed dispersion cavity. The distributed dispersion cavity in the fiber laser successfully reduced the cross-gain saturation in EDF, and thus, enabled multiwavelength operation. Simultaneous generation of wavelength-tunable 10-GHz...Show More
High-Power and High-Order Random Raman Fiber Lasers
High-order random Raman fiber lasers are investigated for generating high-power widely wavelength-tunable light sources. By cascaded random Raman lasing and adjusting pump laser wavelength, continuous wavelength tuning from 1 to 1.9 μm is reported. For power scaling, a high-power Yb-doped fiber laser at 1064 nm with improved temporal stability is developed as the pump source. The ninth-order casca...Show More
Expanding Continuous Tuning Range of a CW Single-Frequency Laser by Combining an Intracavity Etalon With a Nonlinear Loss
Combining intracavity etalon (IE) locked on a laser oscillating mode with a deliberately introduced nonlinear loss, the tuning range of a continuous-wave (CW) single-frequency laser is significantly expanded to transcend the traditional limitation of a free spectral range (FSR) of IE. Due to the action of the nonlinear loss, the frequency of laser oscillating mode can be continuously and smoothly ...Show More
Integrated Coherent Tunable Laser (ICTL) With Ultra-Wideband Wavelength Tuning and Sub-100 Hz Lorentzian Linewidth
Paul A. Morton;Chao Xiang;Jacob B. Khurgin;Christopher D. Morton;Minh Tran;Jon Peters;Joel Guo;Michael J. Morton;John E. Bowers
Journal of Lightwave Technology
Cited by: Papers (35)
This paper describes the design, fabrication, and record performance of a new class of ultra-wideband wavelength tuning, ultra-low noise semiconductor laser, the Integrated Coherent Tunable Laser (ICTL). The ICTL device is designed for, and fabricated in, a CMOS foundry based Silicon Photonics platform, utilizing heterogeneous integration of III-V material to create the integrated gain section of ...Show More
Continuously wavelength-tunable MQW fabry-perot laser diode pulse source with a fiber-based external cavity
A simple continuously wavelength-tunable fiber ring laser pulse source is demonstrated. Such a source employs a gain-switched multiple quantum-well Fabry-Perot laser diode in a self-seeding scheme and the output pulse wavelength can be tuned continuously via a tunable optical filter. The optical pulses generated exhibit a pulsewidth of 92 ps at the frequency of 2.6 GHz. Within a wide wavelength tu...Show More
Widely Tunable Laser on an InP Photonic Integrated Circuit
IEEE Photonics Technology Letters
Cited by: Papers (3)
We present a widely tunable laser design based on three intra-cavity Mach-Zehnder interferometers. The laser has been fabricated in a multi-project wafer run and does not require high precision lithography, as needed for SGDBR lasers. We demonstrate 20 nm of tuning range with output powers of approximately 1 mW in fiber. With an excess of 30 dB in side-mode suppression ratio, the laser can find ap...Show More
Miniaturized external cavity quantum cascade lasers for broad tunability in the mid-infrared
Timothy Day;David Arnone;Salvatore F. Crivello;Miles J. Weida
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference
Year: 2006 | Conference Paper |
Cited by: Patents (16)
Ring cavity widely tunable continuous wave Ytterbium-doped double-clad fiber laser
2021 IEEE International Conference on Electronics, Computing and Communication Technologies (CONECCT)
Year: 2021 | Conference Paper |
We present design development and successful demonstration of highly stable, broadly tunable ytterbium-doped double clad fiber ring laser. A tunable Fabry-Perot filter is placed in a unidirectional ring cavity for the purpose of tuning the wavelength of the laser over a range of 60nm (16 THz) from 1040nm to 1100nm with 0.02nm tuning resolution. The linewidth of the laser is smaller than 0.8nm for ...Show More
Wavelength tuning of a laser diode by using a micromechanical Fabry-Perot interferometer
IEEE Photonics Technology Letters
Cited by: Papers (3)
We studied the wavelength tuning properties of an edge emitting extended cavity laser diode with a micromechanical Fabry-Perot interferometer as an external reflector. It was seen that this arrangement provides essentially similar tuning range (few nanometers) as traditional system with one external mirror only, but with a much smaller mirror movement. In this letter, the theoretical model and the...Show More
Sampled grating tunable twin-guide laser diodes with over 40-nm electronic tuning range
R. Todt;T. Jacke;R. Meyer;J. Adler;R. Laroy;G. Morthier;M.-C. Amann
IEEE Photonics Technology Letters
Cited by: Papers (24)
Device and tuning characteristics of sampled grating tunable twin-guide laser diodes are presented. The vertically integrated, monolithic widely tunable laser requires only two tuning currents to fully cover a wavelength range of more than 40 nm by electrooptic tuning. Its tuning behavior is quasi-continuous with up to 8.2-nm broad continuous tuning regions. High sidemode suppression (SMSR /spl ge...Show More
The 40-year history of research on semiconductor lasers for high-speed long-distance optical fiber communications, so-called dynamic single-mode (DSM) lasers, is reviewed. DSM lasers include phase-shift distributed feedback (DFB) lasers, uniform DFB lasers, wavelength tunable (WT) distributed Bragg reflector lasers, WT distributed reflector lasers, and external reflector lasers. The vertical cavit...Show More
Widely Tunable Dual-Wavelength Fiber Laser in the 2 μm Wavelength Range
Mostafa Sabra;Baptiste Leconte;Dia Darwich;Romain Dauliat;Tobias Tiess;Raphael Jamier;Georges Humbert;Matthias Jäger;Kay Schuster;Philippe Roy
Journal of Lightwave Technology
Cited by: Papers (13)
In this paper, we demonstrate a widely tunable dual-wavelength fiber laser, which is based on a thulium-doped fiber and volume Bragg gratings triggering the emission wavelengths in the 2-μm band. A continuously tunable wavelength separation range (Δλ), from 1 to 144 nm (0.08–11.47 THz) is demonstrated, with > 4.5 W of output power over the tuning range. The laser emission exhibits a linewidth (FWH...Show More
Energy transfer dye laser tuned throughout the red spectrum
2008 4th International Conference on Advanced Optoelectronics and Lasers
Year: 2008 | Conference Paper |
Cited by: Papers (1)
A donor-acceptor couple of dyes for laser tuned from yellow to near-infrared spectrum under excitation with single green line nearby 530 nm was explored. Quantum efficiency of energy transfer in the mixture of laser dyes has been evaluated.Narrow-line width laser emission of the examined dye mixtures was obtained in a grating oscillator with a continuous tunable range from 575 to 734 nm.Show More
Broadly wavelength-tunable external cavity lasers with extremely low power variation over tuning range
Oh Kee Kwon;Kang Ho Kim;Eun Deok Sim;Jong Hoi Kim;Hyun Soo Kim;Kwang Ryong Oh
IEEE Photonics Technology Letters
Cited by: Papers (7)
Tunable external-cavity lasers with low power variation over a broad tuning range are demonstrated using asymmetric multiple quantum-wells with a wide and flat gain. For a 2.8-μm-wide ridge waveguide laser of cavity length 380 μm, when used in a grating external cavity and with an antireflection coating on one facet of laser diode chip, the power variation of less than -1 dB is obtained over a ran...Show More
Wavelength-Tunable Short-Pulse Diode-Laser Fiber-Amplifier System Around 1.06$muhbox m$
B. Adhimoolam;M.G. Hekelaar;P. Gross;I.D. Lindsay;K.-J. Boller
IEEE Photonics Technology Letters
Cited by: Papers (7)
We report the first actively mode-locked diode-laser fiber-amplifier system with wide wavelength tuning around 1.06$muhbox m$. Tuning is achieved over 45 nm via a feedback grating. Pulses with a repetition rate of 1.4 GHz and a pulse duration of 30 ps are generated with up to 9.5 W of average output power.Show More
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