Robert Kruhlak - Academia.edu (original) (raw)

Papers by Robert Kruhlak

Two forms of vector modulation instability are observed in photonic crystal fiber. The strongly v... more Two forms of vector modulation instability are observed in photonic crystal fiber. The strongly varying dispersion of these fibers result in complicated phasematching curves. We experimentally demonstrate the existence of broad regions of parametric gain.

We report on the observation of cross-phase modulation instability in a highly nonlinear photonic... more We report on the observation of cross-phase modulation instability in a highly nonlinear photonic crystal fiber. In such fibers the presence of higher orders of dispersion results in a complex phase-matching curve. We are able to observe this behavior experimentally and obtain excellent agreement between the measured and predicted shifts.

This study demonstrates photonic crystal fiber (PCF) based optical parametric oscillators and amp... more This study demonstrates photonic crystal fiber (PCF) based optical parametric oscillators and amplifiers. In the experiment, a wide range of fibres with varying zero GVD points around the visible red pump wavelength are used. The resulting upshifted sideband is in the yellow region of the spectrum of pumping in the normal dispersion regime (low group index mode) in agreement with simple predictions based on the linear phase matching curve, while the sidebands corresponding to conventional modulation instability are close to the pump wavelength when pumping in the anomalous dispersion regime (the high group index mode of the fibre).

Page 1. ECOC 2005 Proceedings - VoL2 Paper Tu 1.4.5 Using Modulation Instability to Determine the... more Page 1. ECOC 2005 Proceedings - VoL2 Paper Tu 1.4.5 Using Modulation Instability to Determine the Propagation Constant in a Photonic Crystal Fibre Gordon KL Wong (1), Andy YH Chen (1), Sangwoo Ha (1), Robert J. Kruhlak ...

Nonlinear Guided Waves and Their Applications, 2004

We report on a dramatic pump depletion in a modulation instability experiment on a photonic cryst... more We report on a dramatic pump depletion in a modulation instability experiment on a photonic crystal fibre in the normal dispersion regime. Nonlinear Schrodinger simulations have been confirmed with experimental temporal profiles and pump-sideband crosscorrelations.

ABSTRACT Polarization modulation instability in a birefringence photonic crystal fiber has been o... more ABSTRACT Polarization modulation instability in a birefringence photonic crystal fiber has been observed in the normal dispersion regime with a frequency shift of 64 THz between the generated frequencies and the pump frequency.

The members of the Committee appointed to examine the dissertation of ROBERT J. KRUHLAK find it s... more The members of the Committee appointed to examine the dissertation of ROBERT J. KRUHLAK find it satisfactory and recommend that it be accepted. Chair ii ACKNOWLEDGEMENTS I would like to thank my advisor, Mark Kuzyk, for all his help, patience, and enthusiasm. I would also like to thank my family and friends for all their wonderful support.

Nonlinear Guided Waves and Their Applications, 2004

We report on a dramatic pump depletion in a modulation instability experiment on a photonic cryst... more We report on a dramatic pump depletion in a modulation instability experiment on a photonic crystal fibre in the normal dispersion regime. Nonlinear Schrodinger simulations have been confirmed with experimental temporal profiles and pump-sideband crosscorrelations.

Optics Communications, 2006

Nonlinear Guided Waves and Their Applications, 2005

ABSTRACT Polarization modulation instability in a birefringence photonic crystal fiber has been o... more ABSTRACT Polarization modulation instability in a birefringence photonic crystal fiber has been observed in the normal dispersion regime with a frequency shift of 64 THz between the generated frequencies and the pump frequency.

CLEO/Europe. 2005 Conference on Lasers and Electro-Optics Europe, 2005.

Optics Letters, 2006

We report on the observation of cross-phase modulation instability in a highly nonlinear photonic... more We report on the observation of cross-phase modulation instability in a highly nonlinear photonic crystal fiber. In such fibers the presence of higher orders of dispersion results in a complex phase-matching curve. We are able to observe this behavior experimentally and obtain excellent agreement between the measured and predicted shifts.

Optics Letters, 2006

Polarization modulation instability (PMI) in birefringent photonic crystal fibers has been observ... more Polarization modulation instability (PMI) in birefringent photonic crystal fibers has been observed in the normal dispersion regime with a frequency shift of 64 THz between the generated frequencies and the pump frequency. The generated sidebands are orthogonally polarized to the pump. From the observed PMI frequency shift and the measured dispersion, we determined the phase birefringence to be 5.3 x 10(-5) at a pump wavelength of 647.1 nm. This birefringence was used to estimate the PMI gain as a function of pump wavelength. Four-wave mixing experiments in both the normal and the anomalous dispersion regimes generated PMI frequency shifts that show good agreement with the predicted values over a 70 THz range. These results could lead to amplifiers and oscillators based on PMI.

Optics Communications, 2002

Pulse propagation in high gain optical fiber amplifiers with normal group velocity dispersion is ... more Pulse propagation in high gain optical fiber amplifiers with normal group velocity dispersion is studied using numerical simulations of a generalized nonlinear Schrödinger equation including a complex Lorentzian gain profile. In particular, when the bandwidth of the input pulse is significantly less than that of the amplifier transition, an initial period of propagation where parabolic pulse characteristics are observed is followed by a solitary wave regime where the pulse temporal and spectral widths are stabilized by the limiting effect of the ...

Journal of the Optical Society of America B, 1999

Journal of the Optical Society of America B, 2005

Two forms of vector modulation instability are observed in photonic crystal fiber. The strongly v... more Two forms of vector modulation instability are observed in photonic crystal fiber. The strongly varying dispersion of these fibers result in complicated phasematching curves. We experimentally demonstrate the existence of broad regions of parametric gain.

We report on the observation of cross-phase modulation instability in a highly nonlinear photonic... more We report on the observation of cross-phase modulation instability in a highly nonlinear photonic crystal fiber. In such fibers the presence of higher orders of dispersion results in a complex phase-matching curve. We are able to observe this behavior experimentally and obtain excellent agreement between the measured and predicted shifts.

This study demonstrates photonic crystal fiber (PCF) based optical parametric oscillators and amp... more This study demonstrates photonic crystal fiber (PCF) based optical parametric oscillators and amplifiers. In the experiment, a wide range of fibres with varying zero GVD points around the visible red pump wavelength are used. The resulting upshifted sideband is in the yellow region of the spectrum of pumping in the normal dispersion regime (low group index mode) in agreement with simple predictions based on the linear phase matching curve, while the sidebands corresponding to conventional modulation instability are close to the pump wavelength when pumping in the anomalous dispersion regime (the high group index mode of the fibre).

Page 1. ECOC 2005 Proceedings - VoL2 Paper Tu 1.4.5 Using Modulation Instability to Determine the... more Page 1. ECOC 2005 Proceedings - VoL2 Paper Tu 1.4.5 Using Modulation Instability to Determine the Propagation Constant in a Photonic Crystal Fibre Gordon KL Wong (1), Andy YH Chen (1), Sangwoo Ha (1), Robert J. Kruhlak ...

Nonlinear Guided Waves and Their Applications, 2004

We report on a dramatic pump depletion in a modulation instability experiment on a photonic cryst... more We report on a dramatic pump depletion in a modulation instability experiment on a photonic crystal fibre in the normal dispersion regime. Nonlinear Schrodinger simulations have been confirmed with experimental temporal profiles and pump-sideband crosscorrelations.

ABSTRACT Polarization modulation instability in a birefringence photonic crystal fiber has been o... more ABSTRACT Polarization modulation instability in a birefringence photonic crystal fiber has been observed in the normal dispersion regime with a frequency shift of 64 THz between the generated frequencies and the pump frequency.

The members of the Committee appointed to examine the dissertation of ROBERT J. KRUHLAK find it s... more The members of the Committee appointed to examine the dissertation of ROBERT J. KRUHLAK find it satisfactory and recommend that it be accepted. Chair ii ACKNOWLEDGEMENTS I would like to thank my advisor, Mark Kuzyk, for all his help, patience, and enthusiasm. I would also like to thank my family and friends for all their wonderful support.

Nonlinear Guided Waves and Their Applications, 2004

We report on a dramatic pump depletion in a modulation instability experiment on a photonic cryst... more We report on a dramatic pump depletion in a modulation instability experiment on a photonic crystal fibre in the normal dispersion regime. Nonlinear Schrodinger simulations have been confirmed with experimental temporal profiles and pump-sideband crosscorrelations.

Optics Communications, 2006

Nonlinear Guided Waves and Their Applications, 2005

ABSTRACT Polarization modulation instability in a birefringence photonic crystal fiber has been o... more ABSTRACT Polarization modulation instability in a birefringence photonic crystal fiber has been observed in the normal dispersion regime with a frequency shift of 64 THz between the generated frequencies and the pump frequency.

CLEO/Europe. 2005 Conference on Lasers and Electro-Optics Europe, 2005.

Optics Letters, 2006

We report on the observation of cross-phase modulation instability in a highly nonlinear photonic... more We report on the observation of cross-phase modulation instability in a highly nonlinear photonic crystal fiber. In such fibers the presence of higher orders of dispersion results in a complex phase-matching curve. We are able to observe this behavior experimentally and obtain excellent agreement between the measured and predicted shifts.

Optics Letters, 2006

Polarization modulation instability (PMI) in birefringent photonic crystal fibers has been observ... more Polarization modulation instability (PMI) in birefringent photonic crystal fibers has been observed in the normal dispersion regime with a frequency shift of 64 THz between the generated frequencies and the pump frequency. The generated sidebands are orthogonally polarized to the pump. From the observed PMI frequency shift and the measured dispersion, we determined the phase birefringence to be 5.3 x 10(-5) at a pump wavelength of 647.1 nm. This birefringence was used to estimate the PMI gain as a function of pump wavelength. Four-wave mixing experiments in both the normal and the anomalous dispersion regimes generated PMI frequency shifts that show good agreement with the predicted values over a 70 THz range. These results could lead to amplifiers and oscillators based on PMI.

Optics Communications, 2002

Pulse propagation in high gain optical fiber amplifiers with normal group velocity dispersion is ... more Pulse propagation in high gain optical fiber amplifiers with normal group velocity dispersion is studied using numerical simulations of a generalized nonlinear Schrödinger equation including a complex Lorentzian gain profile. In particular, when the bandwidth of the input pulse is significantly less than that of the amplifier transition, an initial period of propagation where parabolic pulse characteristics are observed is followed by a solitary wave regime where the pulse temporal and spectral widths are stabilized by the limiting effect of the ...

Journal of the Optical Society of America B, 1999

Journal of the Optical Society of America B, 2005