Negative dispersion mirrors for dispersion control in femtosecond lasers: chirped dielectric mirrors and multi-cavity Gires–Tournois interferometers

Szipöcs, R.; Kőházi-Kis, A.; Lakó, S.; Apai, P.; Kovács, A. P.; DeBell, Gary W.; Mott, Leonard P.; Louderback, A.W.; Tikhonravov, Alexander V.; Trubetskov, Michael K.

doi:10.1007/s003400000303

Cited by 67 publications

(16 citation statements)

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“…Aperiodic dielectric mirror structures, which are often referred to as chirped mirrors, are advantageous, not only because they introduce a certain amount of negative dispersion, but also because they exhibit a considerably broader highreflectance band than standard, low-dispersion quarterwave (QW) mirror stacks. Aside from chirped mirrors, there is another group of dispersive mirrors referred to as: Gires-Tournois interferometer-type mirrors [2] . The fact that a relationship exists between the electromagnetic energy stored in the volume of a thin-film structure and its GD is known in the field of telecommunication technology [3] .…”

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confidence: 99%

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Relationships among group delay, energy storage, and loss in dispersive dielectric mirrors

Antal

Szipöcs

2012

中国光学快报

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We show that absorbed and stored electromagnetic energy are proportional to the reflection group delay in highly reflective dispersive dielectric mirrors over the high-reflectivity band. Our theoretical considerations are verified by numerical simulations performed on different dielectric mirror structures. The revealed proportionality between group delay and absorbed energy sets constraint on the application of ultrabroadband and/or dispersive dielectric mirrors in broadband or widely tunable, high-power laser systems.OCIS codes: 310. 6805, 140.3330, 260.2030. doi: 10.3788/COL201210.053101.In the last two decades, theoretical and experimental investigations on reflection delay time of optical pulses reflected by multilayer dielectric structures have been of scientific interest because frequency-dependent group delay (GD) of the dielectric mirrors can be well suited for intracavity or extracavity dispersion compensation of ultrashort pulse lasers [1] . Aperiodic dielectric mirror structures, which are often referred to as chirped mirrors, are advantageous, not only because they introduce a certain amount of negative dispersion, but also because they exhibit a considerably broader highreflectance band than standard, low-dispersion quarterwave (QW) mirror stacks. Aside from chirped mirrors, there is another group of dispersive mirrors referred to as: Gires-Tournois interferometer-type mirrors [2] . The fact that a relationship exists between the electromagnetic energy stored in the volume of a thin-film structure and its GD is known in the field of telecommunication technology [3] . This relationship is also a starting point in resolving the long-haul scientific problem of superluminal delay times of electromagnetic wave packets during transmission through highly reflective, lossless photonic bandgap structures [4] . In practical laser systems, however, one usually cannot neglect the absorption (or scattering) loss of dielectric multilayer mirrors because laser performance, such as intracavity loss, beam quality, maximum output power, laser damage threshold power, and others, strongly depends on these physical quantities. From this aspect, one can address the question of whether a general relationship exists between the reflection GD and the absorption loss of a dielectric multilayer mirror (throughout the letter, we mean one-photon or linear absorption when we use the word "absorption"). For QW-stack mirrors, GD and absorptance have been shown as proportional to each other at the central wavelength of the QW mirror when the loss is sufficiently low [5] . For a specific multistack multilayer mirror design, Ferencz et al. also found conspicuous, but unexplained, proportionality of these two physical quantities [6] . For a nonspecific, general, highly reflective dielectric mirror structure, however, neither the relationship between GD and the absorptance nor the relationship between GD and the stored energy in the presence of loss has been investigated systematically thus far.In this letter, we first theoretically d...

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“…On the contrary, cavity-like, resonant "spacer" layers exist in the MCGTI structures (the four thicker layers in Fig. 1), in which a high standing wave field builds up at different wavelengths, causing extremely high GD values [2,3,8] . Three of the four spacer layers of the HS MCGTI structure are made of the higher-index material.…”

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Relationships among group delay, energy storage, and loss in dispersive dielectric mirrors

Antal

Szipöcs

2012

中国光学快报

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“…8, corresponding to the GTI with d GT = 0.34d L and n GT = 1.46. The higher the light energy stored in the GTI the larger group-delay of the propagating pulse can be expected as it is already demonstrated at one-dimensional PBG structures (Szipőcs et al, 2000). This is the reason that the introduced resonant layer is able to reverse the dispersion function resulting in a wavelength dependent standing field in the GTI.…”

Section: Solid Core Bragg Fibrementioning

confidence: 71%

Photonic Crystal Fibre for Dispersion Controll

Várallyay¹,

Saitoh²,

Electric³

2010

Frontiers in Guided Wave Optics and Optoelectronics

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“…(GTI) mirrors [5,37] -two high-reflecting structures separated by a cavity with thickness close to half wavelength of the incident radiation resonantly enclose the impinging wave. Such nanoscale GTI embedded in the multilayer structure can introduce large GDs at selected wavelengths.…”

Section: Resonant Structures or Gires-tournois Interferometermentioning

confidence: 99%

Dispersive mirror technology for ultrafast lasers in the range 220–4500 nm

Pervak¹,

Razskazovskaya

Angelov

et al. 2013

Advanced Optical Technologies

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Nowadays, dispersive mirrors are able to cover the wavelength range of 4.5 optical octaves and can be used from 220 nm up to 4500 nm. Various design approaches to dispersive mirrors in visible and near IR are briefly discussed. We consider in more detail two dispersive mirrors representing extreme cases. The first one is a mirror working in the range of 290−360 nm and providing group delay dispersion of -75 fs 2 . The second one is a mirror working in the range of 2500−4500 nm and providing +500 fs 2 of group delay dispersion.

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Negative dispersion mirrors for dispersion control in femtosecond lasers: chirped dielectric mirrors and multi-cavity Gires–Tournois interferometers

Cited by 67 publications

References 1 publication

Relationships among group delay, energy storage, and loss in dispersive dielectric mirrors

Relationships among group delay, energy storage, and loss in dispersive dielectric mirrors

Photonic Crystal Fibre for Dispersion Controll

Dispersive mirror technology for ultrafast lasers in the range 220–4500 nm

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