Super-Gaussian conical refraction beam

Turpin, Alex; Loiko, Yu.; Kalkandkiev, T.K.; Tomizawa, H.; Mompart, J.

doi:10.1364/ol.39.004349

Cited by 30 publications

(25 citation statements)

References 37 publications

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“…We have explored the influence of ρ 0 over the CR beam and shown that for ρ 0 ≈ 1 both the transverse intensity pattern at the focal plane and the evolution of the beam differs from the CR beam found for ρ 0 ≫ 1, which is characterized at the focal plane by a pair of concentric bright rings with different intensity split by the Poggendorff dark ring. In particular, we have reported the generation of a super-Gaussian beam [68] and a three-dimensional dark focus for ρ 0 = 0.45 and ρ 0 = 0.92 [66], respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Although being the case of a Gaussian input beam the most studied situation in CR for cylindrically symmetric beams [33,[61][62][63][64][65][66][67][68][69], other works have investigated CR for Laguerre-Gauss beams [70,71] and for top-hat beams [72].…”

Section: Diffractive Solution 221 Cylindrically Symmetric Solutionmentioning

confidence: 99%

“…We use a commercially available (CROptics) KGd(WO 4 ) 2 biaxial crystals with α = 16.9 mrad and length l = 10.5 mm yielding CR ring radius of R 0 = 180 µm. [63,66,68] showing that CR can be used to design new CR lasers [138], to increase the directivity of laser beams [63], to generate a super-Gaussian beam [68], to create a three dimensional dark focus [66] and even to develop a novel scheme for super-resolution microscopy [85]. However, in all these works, no deep insight about the SOP of the generated CR beams has been provided.…”

Section: Stokes Vector Formalismmentioning

confidence: 99%

“…In this chapter, we do so for two very particular values of ρ 0 leading to a 3D dark focus (ρ 0 = 0.924) [66] and a Super-Gaussian beam (ρ 0 = 0.445) [68]. Before discussing in detail the features of the 3D dark focus and the Super-Gaussian beam, in this section we show how the ρ 0 parameter affects the intensity pattern of the CR beam.…”

Section: Introductionmentioning

confidence: 96%

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Conical refraction: fundamentals and applications

Turpin

Loiko

Kalkandjiev

et al. 2016

Laser & Photonics Reviews

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A mis padres, hermanos, sobrinos y a Raquel AcknowledgmentsTot té un principi i un final i aquest serà el punt final a una etapa de la meva vida la qual estic segur que d'aquí uns anys, quan miri enrere, veuré que ha estat probablement la que ha tingut una major rellevància tant a nivell personal com científic. Quan vaig acabar la carrera no tenia gaire clar quin camí seguir però vaig tenir la sort de parlar amb qui ha estat el meu director de tesi, el Jordi, qui em va guiar i va posar tota la seva confiança en mi des del primer moment. Em va oferir un tema original i es va aventurar a dirigir una tesi amb una forta vessant experimental, tot un atreviment venint d'un teòric! Quan vaig començar el Màster, si m'haguessin dit on he arribat 5 anys després mai m'ho hauria cregut i, Jordi, tu tens gran part de culpa de tot això. Moltes gràcies per haver confiat en mi des del primer dia, per haver-te mostrat sempre tan orgullós de tot el que he fet, per haver estat sempre disponible i per ajudar-me i animar-me quan he passat moments durs durant aquest anys. M'has ensenyat a ser un bon científic, a moure'm dins aquest món, a creure em mi i a ser una millor persona. Mai t'estaré prou agraït per tot això i per haver sigut tan proper amb els teus cotilleos, converses de futbol, política, noies, etc. dinant al bar. Has estat com un pare per a mi (bueno, un germà gran, que tampoc ets tan vell per a ser Mompare :P). Si el Jordi ha estat el meu pare en la ciència, el Yury ha estat el meu gurú científic. Mai he trobat una persona tan pacient, que sàpiga tant de qualsevol tema i amb tanta dedicació com tu. M'has ensenyat a ser riguròs, a tenir un mètode, la importància de estar al dia de tot el que es fa en el cap d'estudi, a programar, i un llarg etcètera. En resum, m'has ajudat a donar-me forma a mi mateix com a científic i a tenir perseverança en el que faig. Tot això sense oblidar que per a mi ets un gran amic! Seguidament, també he donar les gràcies al Todor, una de les persones més enèrgiques que conec i amb més passió per la ciència. Tu vas iniciar tot el tema de la refracció cònica al nostre grup i has demostrat que ets realment qui més coneix de cristalls i del fenomen en si. Si no hagués estat per tu, no podríem haver començat res d'això i no podríem haver explotat el fenomen ni una quarta part del que hem fet. Ets un exemple per tenir sempre un somriure a la cara i per aquesta iii iv força que et fa tirar endavant tots els teus projectes. També vull donar les gràcies a altres companys del Grup d'Òptica, començant per la Verònica, que va passar de ser una "professora de la carrera" a ser el meu ideal de constància i l'esforç. Ets un exemple professional a més a més d'una persona molt més propera i alegra del que pot semblar a primera vista. A Ramón también le tengo que agradecer su ayuda y su disponibilidad a lo largo de estos años, su paciencia cuando ha tenido que soportar mis imitaciones y su alegría y naturalidad en todo momento. Amb el Francesc també he compartit molts bons moments, sobretot a les diverses activit...

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Section: Discussionmentioning

confidence: 99%

Section: Diffractive Solution 221 Cylindrically Symmetric Solutionmentioning

confidence: 99%

Section: Stokes Vector Formalismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

Conical refraction: fundamentals and applications

Turpin

Loiko

Kalkandjiev

et al. 2016

Laser & Photonics Reviews

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“…The * Corresponding author: alejandro.turpin@uab.cat above named features of CR beams are valid under the assumption that the CR geometrical ring radius R 0 is much bigger than the waist radius of the focused input beam w 0 , i.e., assuming that ρ 0 ≡ R 0 /w 0 ≫ 1. For smaller values of ρ 0 , different light structures are formed [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Conical refraction healing after partially blocking the input beam

et al. 2015

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In conical refraction, when a focused Gaussian beam passes along one of the optic axes of a biaxial crystal it is transformed into a pair of concentric bright rings at the focal plane. We demonstrate both theoretically and experimentally that this transformation is hardly affected by partially blocking the Gaussian input beam with an obstacle. We analyze the influence of the size of the obstruction both on the transverse intensity pattern of the beam and on its state of polarization, which is shown to be very robust

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Lasing with conical diffraction feature in the KGd(WO4)2:Nd biaxial crystal

Brenier

2016

Appl. Phys. B

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With an experimental set-up designed to record simultaneously the far field and the near field patterns, we got lasing with feature of conical diffraction in the biaxial Nd 3+ -doped KGd(WO 4 ) 2 crystal. The key-point is that the lasing direction is not single and is constituted by an angular distribution including the optical axis. Very slight changes of crystal orientation leads to crescent shape 1068 nm light distributions in the near field. The beam launched towards the biaxial crystal is mainly linear polarized with its intensity in agreement with the Nd fluorescence angular distribution. A theoretical background is provided, including the monoclinic and triclinic symmetries and laser amplification including elliptical modes and cavity round trip.

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Super-Gaussian conical refraction beam

Cited by 30 publications

References 37 publications

Conical refraction: fundamentals and applications

Conical refraction: fundamentals and applications

Conical refraction healing after partially blocking the input beam

Lasing with conical diffraction feature in the KGd(WO4)2:Nd biaxial crystal

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