ultrashort laser pulse

Ebook "Ultrashort laser pulses in biology and medicine" gives an overview of biological and medical applications of these laser pulses. The briefness of these laser pulses permits the tracing of the fastest processes in photo-active bio-systems, which is one focus of the book. The other focus is applications that rely on the high peak intensity of ultrashort laser pulses. Examples covered span non-linear imaging techniques, optical tomography, and laser surgery.

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The benefits of pulsed laser ablation in advanced manufacturing have been studied in terms of intensity, adequate orientation, damped noise, and great adaptability. During ultrashort laser ablation, the interaction between a copper surface and numerous pulses was explored to establish ideal focusing conditions.

7p vihawkeye 26-05-2023 7 2   Download

In this study, we expand to investigate a more complicated system, H+ 2 molecule in the superposition of the ground and second excited states, exposed to an ultrashort intense laser pulse by numerically solving the time-dependent Schrodinger equation.

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This amplifier is used to amplify nanojoule and femtosecond Ti:Sapphire laser pulses to yield a 70 µJ pulse energy at 10 Hz repetition rate, which corresponds to an amplification factor of 10000 times. The amplified laser pulses are expected to be nearly transform-limited with a pulse duration of less than 100 fs. Such an amplifier will expand applications of ultrafast modelocked Ti:Sapphire laser oscillator.

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femtosecond laser pulses principles and experiments is compiled with the content: laser basics, pulsed optics, methods for the generation of ultrashort laser pulses mode-locking, further methods for the generation of ultrashort optical pulses, pulsed semiconductor lasers, how to manipulate and change the characteristics of laser pulses,... invite you to consult the document details.

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This book discusses aspects of laser pulses generation, characterization, and practical applications. Some new achievements in theory, experiments, and design are demonstrated. The introductive chapter shortly overviews the physical principles of pulsed lasers operation with pulse durations from seconds to yoctoseconds. A theory of mode-locking, based on the optical noise concept, is discussed. With this approximation, all paradoxes of ultrashort laser pulse formation have been explained.

556p cucdai_1 19-10-2012 83 18   Download

the generation of ultrashort laser pulses. Beginning with mode-locking of glass lasers in the 1960s, the development of dye lasers brought the pulse width down from picoseconds to femtoseconds. The breakthrough in solid state laser pulse generation provided the current reliable table-top laser systems capable of average power of about 1 watt, and peak power density of easily watts per square centimeter, with pulse widths in the range of four to eight femtoseconds.

356p dongkhanh0908 10-10-2012 64 13   Download

The molecular carbon dioxide laser was invented in 1964 by C. K. N. Patel at Bell Labs. Immediately, it proved to be a high-power, continuous wave (CW) laser and a relatively high-efficiency gas laser (20-25% conversion of electrical energy into laser radiation), both in CW or pulsed operation. As a matter of fact, the CO2 lasers are the highest-power CW lasers (more than 100 kW) and one of the highest-energy pulsed gas laser (100 kJ) that are currently available.

446p qsczaxewd 22-09-2012 62 19   Download

The studies of ultrashort laser pulse interactions with single atoms, molecules, nanoparticles and condensed matter is a hot topic of modern physics, since the obtained results stimulate the development of fundamental principles of light-matter interaction and, at the same time, find the wide area of practical applications. This volume contains the contributions devoted both to the discussion of general principles and fundamental experiments, as well as the different practical applications.

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Tham khảo sách 'coherence and ultrashort pulse laser emission_2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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In this volume, recent contributions on coherence provide a useful perspective on the diversity of various coherent sources of emission and coherent related phenomena of current interest. These papers provide a preamble for a larger collection of contributions on ultrashort pulse laser generation and ultrashort pulse laser phenomena. Papers on ultrashort pulse phenomena include works on few cycle pulses, high-power generation, propagation in various media, and a variety of applications of current interest....

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A new type of semiconductor laser is studied, in which injected carriers in the active region are quantum mechanically confined in localized finite self-assembled wire-like quantumdash (Qdash) structures that are varied in sizes and compositions. Effects of such carrier distribution and quasi three-dimensional density of states contribute to a quasisupercontinuum interband lasing characteristics, which is a new laser design platform as compared to continuous broad emission spectrum generated by nonlinear media pumped with ultrashort laser pulse....

364p 123859674 30-06-2012 68 14   Download

Tham khảo tài liệu 'coherence and ultrashort pulse laser emission part 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

40p 181024119872 07-02-2012 62 4   Download

Tham khảo tài liệu 'coherence and ultrashort pulse laser emission part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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Tham khảo tài liệu 'coherence and ultrashort pulse laser emission part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

40p 181024119872 07-02-2012 51 5   Download

Tham khảo tài liệu 'coherence and ultrashort pulse laser emission part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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Tham khảo tài liệu 'coherence and ultrashort pulse laser emission part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

40p 239198719 01-02-2012 42 4   Download

Tham khảo tài liệu 'coherence and ultrashort pulse laser emission part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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Tham khảo tài liệu 'coherence and ultrashort pulse laser emission part 16', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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Tham khảo tài liệu 'coherence and ultrashort pulse laser emission part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

40p 239198719 01-02-2012 41 3   Download