Gain-Clamping for an Externally-Incident Field Passing through a Laser Cavity

Enforcing Local Power Conservation for Metasurface Design Using Electromagnetic Inversion

10.36227/techrxiv.11768796.v1 ◽

2020 ◽

Author(s):

Trevor Brown ◽

Yousef Vahabzadeh ◽

Christophe Caloz ◽

Puyan Mojabi

Keyword(s):

Optimization Procedure ◽

Incident Field ◽

Additional Constraint ◽

Two Dimensional ◽

Local Power ◽

Power Conservation ◽

Cost Functional ◽

Field Transformation

<pre>A method based on electromagnetic inversion is extended to facilitate the design of passive, lossless, and reciprocal metasurfaces. More specifically, the inversion step is modified to ensure that the field transformation satisfies local power conservation, using available knowledge of the incident field. This paper formulates a novel cost functional to apply this additional constraint, and describes the optimization procedure used to find a solution that satisfies both the user-defined field specifications and local power conservation. Lastly, the method is demonstrated with a two-dimensional (2D) example.</pre>

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A switchable triple-wavelength erbium-doped fiber laser with a linear laser cavity

Microwave and Optical Technology Letters ◽

10.1002/mop.21429 ◽

2006 ◽

Vol 48 (4) ◽

pp. 632-635 ◽

Cited By ~ 1

Author(s):

D. Liu ◽

N. Q. Ngo ◽

H. N. Chan ◽

C. K. Teu ◽

S. C. Tjin

Keyword(s):

Fiber Laser ◽

Laser Cavity ◽

Erbium Doped ◽

Linear Laser

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VS2 as saturable absorber for Q-switched pulse generation

Nanophotonics ◽

10.1515/nanoph-2020-0128 ◽

2020 ◽

Vol 9 (8) ◽

pp. 2569-2576 ◽

Cited By ~ 4

Author(s):

Lu Li ◽

Lihui Pang ◽

Qiyi Zhao ◽

Yao Wang ◽

Wenjun Liu

Keyword(s):

Saturable Absorber ◽

Nonlinear Optical ◽

Modulation Depth ◽

Signal To Noise Ratio ◽

Transition Metal Dichalcogenides ◽

Laser Cavity ◽

Pulse Generation ◽

High Signal ◽

Power Pulse ◽

Metal Dichalcogenides

AbstractTransition metal dichalcogenides have been widely utilized as nonlinear optical materials for laser pulse generation applications. Herein, we study the nonlinear optical properties of a VS2-based optical device and its application as a new saturable absorber (SA) for high-power pulse generation. Few-layer VS2 nanosheets are deposited on the tapered region of a microfiber to form an SA device, which shows a modulation depth of 40.52%. After incorporating the microfiber-VS2 SA into an Er-doped fiber laser cavity, passively Q-switched pulse trains could be obtained with repetition rates varying from 95 to 233 kHz. Under the pump power of 890 mW, the largest output power and shortest pulse duration are measured to be 43 mW and 854 ns, respectively. The high signal-to-noise ratio of 60 dB confirms the excellent stability of the Q-switching state. To the best of our knolowdge, this is the first illustration of using VS2 as an SA. Our experimental results demonstrate that VS2 nanomaterials have a large potential for nonlinear optics applications.

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Asynchronously modulated waves in a ring laser cavity

Applied Optics ◽

10.1364/ao.41.001098 ◽

2002 ◽

Vol 41 (6) ◽

pp. 1098 ◽

Cited By ~ 2

Author(s):

Frank V. Kowalski ◽

Josh Buhl ◽

Ben McMahon

Keyword(s):

Ring Laser ◽

Laser Cavity ◽

Modulated Waves

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Active Cloaking Without A Priori Incident Field Knowledge

2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting ◽

10.1109/ieeeconf35879.2020.9330122 ◽

2020 ◽

Author(s):

Paris Ang ◽

George V. Eleftheriades

Keyword(s):

A Priori ◽

Incident Field

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Comparative investigation of lasing and amplification performance in cryogenic Yb:YLF systems

Applied Physics B ◽

10.1007/s00340-021-07588-8 ◽

2021 ◽

Vol 127 (3) ◽

Author(s):

Umit Demirbas ◽

Martin Kellert ◽

Jelto Thesinga ◽

Yi Hua ◽

Simon Reuter ◽

...

Keyword(s):

Continuous Wave ◽

Estimation Method ◽

Laser Cavity ◽

Comparative Investigation ◽

Limiting Factor ◽

Experimental Conditions ◽

Temperature Estimation ◽

Transverse Temperature ◽

First Time

AbstractWe present detailed experimental results with cryogenic Yb:YLF gain media in rod-geometry. We have comparatively investigated continuous-wave (cw) lasing and regenerative amplification performance under different experimental conditions. In the cw lasing experiments effect of crystal doping, cw laser cavity geometry and pump wavelength on lasing performance were explored. Regenerative amplification behavior was analyzed and the role of depolarization losses on performance was investigated. A recently developed temperature estimation method was also employed for the first time in estimating average crystal temperature under lasing conditions. It is shown that the thermal lens induced by transverse temperature gradients is the main limiting factor and strategies for future improvements are discussed. To the best of our knowledge, the achieved results in this study (375 W in cw, and 90 W in regenerative amplification) are the highest average powers ever obtained from this system via employing the broadband E//a axis.

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