Spectral manipulation in Fabry-Perot lasers: perturbative inverse scattering approach

O’Brien, Stephen; Amann, Andreas; Fehse, R.; Osborne, S.; O’Reilly, Eoin P.; Rondinelli, James M.

doi:10.1364/josab.23.001046

Cited by 32 publications

(18 citation statements)

References 10 publications

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“…Figure 1(a) depicts the setup for our experiment. The master laser is a low linewidth, singlemode, wavelength tunable laser and the slave laser is a Two Mode semiconductor laser [15,16]. The slave laser is temperature stabilised to within ±1 mK and is operated at a normalised pump current P = J−J T hr 2J T hr = 0.5, which is twice threshold and corresponds to where both modes are observed to have equal intensity (two-colour point).…”

Section: Introductionmentioning

confidence: 99%

Experimental classification of dynamical regimes in optically injected lasers

O’Shea¹,

Osborne²,

Blackbeard³

et al. 2014

Opt. Express

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We present a reliable and fast technique to experimentally categorise the dynamical state of optically injected two mode and single mode lasers. Based on the experimentally obtained time-traces locked, unlocked and chaotic states are distinguished for varying injection strength and detuning. For the two mode laser, the resulting experimental stability diagram provides a map of the various single mode and two mode regimes and the transitions between them. This stability diagram is in strong agreement with the theoretical predictions from low-dimensional dynamical models for two mode lasers. We also apply our method to the single mode laser and retain the close agreement between theory and experiment.

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Section: Introductionmentioning

confidence: 99%

Experimental classification of dynamical regimes in optically injected lasers

O’Shea¹,

Osborne²,

Blackbeard³

et al. 2014

Opt. Express

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“…The sinc function which is the Fourier-transform of the rectangular function meets this condition. It can be shown [6] that the shape of g m (1) (see Eq. (2)) can have the same shape.…”

Section: Model and Formalismmentioning

confidence: 99%

“…One of the approaches is considered hereafter. In this manuscript we develop a method first predicted in [6] of flexible manipulation the gain spectrum of a stripe laser.…”

Section: Introductionmentioning

confidence: 99%

Spectral selection of spatial modes in edge‐emitting lasers

Savenko

Gordeev

Iorsh

et al. 2012

Phys. Status Solidi C

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We have analytically considered the way of high‐order lateral modes suppression in edge‐emitting lasers by integrating into the cavity a spectral filter based on the set of etched micrometer‐size features. We have found optimal features location and numerically calculated their spectral and loss properties for single‐mode laser and investigated the effect robustness against size fluctuation (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…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 effective index along the FabryPerot cavity is modified by N additional features that are described by an index step ∆n.…”

mentioning

confidence: 99%

“…The feature density function shown is then sampled in order to define the appropriate effective index profile [11]. The cavity is asymmetric with one high-reflection coated mirror, and features are placed on the opposite side of the device center to this mirror where the feature density function is more uniform.…”

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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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Spectral manipulation in Fabry-Perot lasers: perturbative inverse scattering approach

Cited by 32 publications

References 10 publications

Experimental classification of dynamical regimes in optically injected lasers

Experimental classification of dynamical regimes in optically injected lasers

Spectral selection of spatial modes in edge‐emitting lasers

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

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