Results 251 to 260 of about 62,046 (293)

Narrow linewidth quantum cascade laser

Conference on Lasers and Electro-Optics, 2020
A narrow linewidth quantum cascade laser was obtained by optical feedback locking to a high finesse linear cavity with locking bandwidth larger than 5 MHz, resulting in an instantaneous linewidth at mHz levels.
Gang Zhao, D. Michelle Bailey, Adam J. Fleisher   +2 more
openaire   +1 more source

Multielement laser-diode linewidth theory

Optics Letters, 1988
A simple formula is presented for the linewidth-power product of multielement laser diodes, under the condition that the active elements are submitted to the same field. The theory is particularly applicable to laser diodes incorporating two thin active layers of different composition.
openaire   +2 more sources

Diode laser with 1 Hz linewidth

Optics Letters, 2006
We report an ultranarrow-linewidth laser spectrometer at 657 nm, consisting of a diode laser locked in a single stage to a stable high-finesse reference cavity. The system is characterized by comparison with a second independent system. From beat frequency measurements a linewidth below 1.5 Hz (FWHM) and a fractional instability of less than 2 x 10(-15)
H, Stoehr, F, Mensing, J, Helmcke, U, Sterr   +3 more
openaire   +2 more sources

Narrow linewidth single frequency microfiber laser

Optics Letters, 2012
A compact 2 kHz linewidth single frequency microfiber ring laser is demonstrated. Microfiber, with a diameter of 1.88 μm, which is drawn from an Er(3+)/Yb(3+) co-doped phosphate glass fiber, serves as the gain medium. By using this microfiber, a double-knot resonator with a total length of 1.75 mm is constructed.
Wei, Fan, Jiulin, Gan, Zhishen, Zhang, Xiaoming, Wei, Shanhui, Xu, Zhongmin, Yang   +5 more
openaire   +2 more sources

Continuously linewidth tunable, polarisation maintaining, narrow linewidth fiber laser

Fiber Lasers XVI: Technology and Systems, 2019
High power polarised narrow linewidth sources are of immense importance in coherent beam combining (increased path length accuracy), spectral beam combining (reduced angular spread), non-linear frequency conversion (increased parametric gain) and remote detection.
B. S. Vikram, Vishal Choudhury, Roopa Prakash, Santosh Aparanji, V. R. Supradeepa   +4 more
openaire   +1 more source

Theory of the fundamental laser linewidth

Physical Review A, 1991
The theory of the laser linewidth is formulated to account for arbitrarily large output couplings and spatial hole burning. We show explicitly that the linewidth can be interpreted in terms of either spontaneous-emission noise or the amplification of vacuum field modes leaking into the cavity, depending on the ordering of operators in the correlation ...
, Goldberg, , Milonni, , Sundaram
openaire   +2 more sources

Self-homodyne Laser Linewidth Measurements

Conference on Lasers and Electro-Optics Europe, 1996
Accurate knowledge of the laser linewidth is essential for many applications in coherent optical communication, optical metrology and high-resolution spectroscopy. The self-heterodyne/homo-dyne measurement technique is an established method for measuring the linewidth of semiconductor lasers [1, 2].
Hanne Ludvigsen, Jukka Kokkonen, Mika Tossavainen, Matti Kaivola   +3 more
openaire   +2 more sources

Modulatable narrow-linewidth semiconductor lasers

Applied Physics Letters, 1988
We find that using the technique of optical feedback locking, to narrow semiconductor linewidths, does not sacrifice the ability to modulate the laser’s frequency via the injection current. The frequency of a laser is stabilized to a separate Fabry–Perot reference cavity using resonant optical feedback and can be modulated efficiently at frequencies ...
L. Hollberg, M. Ohtsu
openaire   +1 more source

Subnatural Linewidth Laser Spectroscopy

1986
Efforts to observe subnatural linewidth spectra in the visible wavelength region are reviewed and our recently developed new method of subnatural spectroscopy by phase switching of a laser beam is described in detail.
H. Takuma, F. Shimizu, K. Shimizu
openaire   +1 more source

Integrated-optic, narrow-linewidth laser

Applied Physics Letters, 1986
We report the demonstration of the single-frequency and narrow-linewidth (<100 kHz) operation of an extended cavity laser consisting of a Ti:LiNbO3 single-mode waveguide circuit and an InGaAsP waveguide gain medium. A parallel coupled cavity, electro-optic elements for tuning the resonant frequencies of the cavities, and an external phase ...
S. K. Korotky, E. A. J. Marcatili, G. Eisenstein, J. J. Veselka, F. Heismann, R. C. Alferness   +5 more
openaire   +1 more source