Inverse scattering approach to multiwavelength Fabry-Pérot laser design

O’Brien, Shane; Osborne, S.; Buckley, Kevin; Fehse, R.; Amann, Andreas; O’Reilly, Eoin P.; Barry, Liam P.; Anandarajah, Prince M.; Patchell, J.; O’Gorman, J.

doi:10.1103/physreva.74.063814

Cited by 21 publications

(27 citation statements)

References 20 publications

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“…The exact positions of these slots are determined by relating the refractive index profile in real space to the threshold gain in wavenumber space and then solving the corresponding inverse problem. 10 The optical spectrum of the free running two-color laser is shown in Fig. 1, where the spacing between the short wavelength mode m 2 and long wavelength mode m 1 is 480 GHz corresponding to a frequency separation between six fundamental FP modes.…”

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confidence: 99%

Bistability in an injection locked two color laser with dual injection

Heinricht

Wetzel

O’Brien

et al. 2011

Applied Physics Letters

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A two color Fabry-Perot laser subjected to optical injection in both modes is examined experimentally and theoretically. The theoretical analysis predicts a bistability between locked states due to a swallow-tail bifurcation, which is unique to the dual injection system. This bistability is confirmed experimentally and used as the basis for an all optical memory element with switching times below 500 ps. (C) 2011 American Institute of Physics. (doi: 10.1063/1.3605584

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confidence: 99%

Bistability in an injection locked two color laser with dual injection

Heinricht

Wetzel

O’Brien

et al. 2011

Applied Physics Letters

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“…In order to limit the number of lasing modes to, for example, only two modes, we introduce a small number of perturbative features along the cavity. The positions of the features are determined via the solution of the corresponding inverse problem [8,9]. In principle this technique allows us to arbitrarily select two lasing modes among a pool of the order of 30 or more fundamental Fabry-Pérot modes that are available.…”

Section: Properties Of Free Running Two-mode Lasersmentioning

confidence: 99%

“…We concentrate on the case of a two-mode laser, where the two lasing modes are choosen to be four fundamental Fabry-Pérot modes apart, since so far this is the experimentally most studied case [9,10].…”

Section: Properties Of Free Running Two-mode Lasersmentioning

confidence: 99%

“…This would be highly desirable from a fundamental point of view, since it would allow one to test many of the concepts in complex network theory experimentally, and could lead the way to highly interesting applications. In this paper we will theoretically explore the possibility of implementing an optical complex network on the basis of the recently developed discrete-mode Fabry-Pérot lasers [8,9]. To this end, we will first review the relevant properties of the uncoupled two-mode lasers in Sec.…”

Section: Introductionmentioning

confidence: 99%

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Complex networks based on discrete-mode lasers

Amann

Pokrovskiy

Osborne

et al. 2008

J. Phys.: Conf. Ser.

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Abstract. We propose a method to combine a number of discrete-mode lasers to construct a complex network with a nontrivial topology. The topological properties of this network are only encoded in the selection of the active modes for each laser, while the optical fibre coupling between the lasers is trivial. In a very simplified model of this network, we establish the stability of the fixed point with all lasing modes switched on.

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“…Such an approach has some features in common with that described in [8], although, in our case the effective index profile along the device is derived directly from an inverse problem solution. This approach has allowed us to design singlemode [9], and two-mode Fabry-Perot diode lasers [10] with high spectral purity and can in principle provide a much greater degree of control of the mode-locked spectrum of the laser. To demonstrate passive mode-locking of a discrete comb of Fabry-Perot modes, a saturable absorber section is placed adjacent to one of the cavity mirrors.…”

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confidence: 99%

Passive harmonic mode locking by mode selection in Fabry–Perot diode lasers with patterned effective index

2010

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We demonstrate passive harmonic mode-locking of a quantum well laser diode designed to support a discrete comb of Fabry-Perot modes. Spectral filtering of the mode spectrum was achieved using a non-periodic patterning of the cavity effective index. By selecting six modes spaced at twice the fundamental mode spacing, near-transform limited pulsed output with 2 ps pulse duration was obtained at a repetition rate of 100 GHz.The generation of high power, ultrashort optical pulses using mode-locked diode lasers is of considerable importance across a range of applications in optical communication systems and data processing [1,2]. In recent years, the wide gain bandwidth of certain self-assembled gain materials has enabled sub-picosecond and femtosecond pulsewidths to be obtained [3][4][5]. In parallel, various techniques such as colliding pulse mode-locking (CPML) and harmonic mode-locking have been adapted for diode lasers that allow higher repetition rates to be achieved while avoiding the lower average power associated with short device lengths [1].CPML places the saturable absorber section at the center of the cavity. Two counterpropagating pulses are formed and collide at the center. In this way the saturation of the absorption is enhanced and the repetition rate is simultaneously doubled from the fundamental [6]. Harmonic mode-locking of diode lasers can be achieved by forcing the device to lock on a set of equally spaced but non-adjacent cavity modes. With this approach, terahertz (THz) repetition rates have been achieved in devices that incorporate distributed Bragg reflector mirrors [7] and intra-cavity reflectors [8]. A limitation of these approaches to harmonic mode-locking however is the fact that only the harmonic frequency rather than the precise form of the mode-locked spectrum itself can be specified.In this letter we demonstrate an approach to passive mode-locking of diode lasers based on the selection of individual modes from the spectrum of Fabry-Perot resonances. Mode selection is achieved by a distributed reflection mechanism that is designed as a perturbation of the Fabry-Perot mode spectrum. Such an approach has some features in common with that described in [8], although, in our case the effective index profile along the device is derived directly from an inverse problem solution. This approach has allowed us to design singlemode [9], and two-mode Fabry-Perot diode lasers [10] with high spectral purity and can in principle provide a much greater degree of control of the mode-locked spectrum of the laser. To demonstrate passive mode-locking of a discrete comb of Fabry-Perot modes, a saturable absorber section is placed adjacent to one of the cavity mirrors. In the device we consider here, six primary modes are chosen with a spacing of two fundamental modes leading to mode-locking at the first harmonic of the cavity.We have shown that a set of self-consistent equations for the lasing modes can be found by making an expansion about the cavity resonance condition in a FabryPerot laser [11]. The ef...

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Inverse scattering approach to multiwavelength Fabry-Pérot laser design

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Cited by 21 publications

References 20 publications

Bistability in an injection locked two color laser with dual injection

Bistability in an injection locked two color laser with dual injection

Complex networks based on discrete-mode lasers

Passive harmonic mode locking by mode selection in Fabry–Perot diode lasers with patterned effective index

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