Gain-assisted superluminal propagation in coupled optical resonators

2005 ◽  
Vol 22 (10) ◽  
pp. 2237 ◽  
Author(s):  
Hongrok Chang ◽  
David D. Smith
Keyword(s):  
Optical Resonators ◽  
Superluminal Propagation

Apparent Superluminal Propagation of a Laser Pulse in a Gain Medium

2001 ◽  
Author(s):  
Phillip Sprangle ◽  
Joseph Penano ◽  
Bahman Hafizi
Keyword(s):  
Laser Pulse ◽  
Gain Medium ◽  
Superluminal Propagation

Degrees of freedom and problems in f(T) gravity

2018 ◽  
Vol 15 (supp01) ◽  
pp. 1850139 ◽  
Author(s):  
Yen Chin Ong
Keyword(s):  
Degrees Of Freedom ◽  
Lorentz Invariance ◽  
Modified Theories Of Gravity ◽  
Recent Effort ◽  
Original Formulation ◽  
Actual Number ◽  
Specific Choice ◽  
Superluminal Propagation ◽  
Theories Of Gravity ◽  
Local Lorentz Invariance

Torsion-based modified theories of gravity, such as [Formula: see text] gravity, are arguably one of the very few “true” modified gravities based on well-defined geometric structures. However, the original formulation explicitly works in a specific choice of frame, which has led to considerable amount of confusion in the literature about these theories breaking local Lorentz invariance. Pathological properties such as superluminal propagation and the lack of well-posedness of Cauchy problem were found to plague [Formula: see text] gravity. Recent effort to “covariantize” [Formula: see text] gravity has, however, renewed interests in this subject. In this proceeding paper, we review and discuss issues concerning the actual number of degrees of freedom in [Formula: see text] gravity, and how this might relate to the aforementioned pathologies.

New type of unstable optical resonators

2012 ◽  
Author(s):  
Anatoliy M. Radin ◽  
Vyacheslav N. Kudashov ◽  
Alexandr B. Plachenov
Keyword(s):  
Optical Resonators ◽  
New Type

Dye-laser frequency stabilization using optical resonators

1984 ◽  
Vol 33 (3) ◽  
pp. 179-185 ◽  
Author(s):  
J. Hough ◽  
D. Hils ◽  
M. D. Rayman ◽  
L. -S. Ma ◽  
L. Hollberg ◽  
...  
Keyword(s):  
Laser Frequency ◽  
Frequency Stabilization ◽  
Optical Resonators ◽  
Dye Laser ◽  
Laser Frequency Stabilization
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