Generation of high-speed single-wavelength optical pulses in semiconductor lasers with orthogonal-polarization optical feedback

Cheng, Da-Long; Yen, Tsu-Chiang; Chang, Jia‐Lin; Tsai, Jenn-Kai

doi:10.1016/s0030-4018(03)01566-9

Cited by 16 publications

(8 citation statements)

References 12 publications

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“…An optical feedback scheme that has received a lot of attention has been referred to as polarization-rotated (PR) feedback or orthogonal feedback [5][6][7][8][9][10][11][12][13][14]. In this scheme a 90-deg polarization-rotating device is placed in the external cavity, and thus, the associated linear orthogonal polarizations (in the following referred to as x and y) are mutually fed back: x-polarized light is reinjected into the laser as y-polarized light after a delay time τ , and vice versa.…”

Section: Introductionmentioning

confidence: 99%

Square-wave switching in vertical-cavity surface-emitting lasers with polarization-rotated optical feedback: Experiments and simulations

et al. 2012

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We study experimentally the dynamics of vertical-cavity surface-emitting lasers (VCSELs) with polarizationrotated (PR) optical feedback, such that the natural lasing polarization of a VCSEL is rotated by 90 deg and then is reinjected into the laser. We observe noisy, square-wave-like polarization switchings with periodicity slightly longer than twice the delay time, which degrade to (or alternate with) bursts of irregular oscillations. We present results of simulations that are in good agreement with the observations. The simulations demonstrate that close to threshold the regular switching is very sensitive to noise, while well above threshold is less affected by the noise strength. The frequency splitting between the two polarizations plays a key role in the switching regularity, and we identify wide parameter regions where deterministic and robust switching can be observed.

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Section: Introductionmentioning

confidence: 99%

Square-wave switching in vertical-cavity surface-emitting lasers with polarization-rotated optical feedback: Experiments and simulations

et al. 2012

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“…Orthogonal optical feedback has been used in semiconductor lasers either to improve frequency stability and spectral characteristics [3], [4], or to induce instabilities and dynamical behavior [1], [5], [6], and some other applications [7], [8], [9], [10]. Since the first report by Kawaguchi in 1988 [3], some of these applications take advantage of the emission frequency dependence on the orthogonal feedback power.…”

Section: Introductionmentioning

confidence: 99%

Diode laser operation under orthogonal feedback: Experiments and theory

Sorrentino

Masoller

Soares

et al. 2011

2011 Fifth Rio De La Plata Workshop on Laser Dynamics and Nonlinear Photonics

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Abstract-We report experimental and numerical investigations concerning semiconductor lasers emission under polarization-rotated feedback. We experimentally observe that for some semiconductor lasers the weak TM mode does lase even in the absence of TM feedback and we monitor how the TE and TM emissions evolve with the increase of the TM feedback strength. The emission frequency of a semiconductor laser subject to polarization-rotated feedback experiences a shift proportional to the optical power fed back into the laser [1]. We aim to investigate what affects the sensibility of the frequency of semiconductor lasers to polarization-rotated feedback. Experimentally, we measured the proportionality coefficient β between frequency shift and feedback power for different lasers and characterized how it varies with some parameters. Theoretically, we made numerical calculations using a rate equation model [2], and our results show a critical dependence of the β coefficient on the gain self-and cross-saturation of both modes and the relations between these saturation coefficients.

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“…In comparison to coherent optical feedback, incoherent optical feedback effects on semiconductor laser have received much less attention, [1]- [13]. The early work on incoherent optical feedback mainly investigated the possibility of generating picosecond pulses, [3]- [9].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it is also difficult to ensure that the returning beam is completely incoherent with the laser field. The majority of the incoherent optical feedback experiments reported in the literature have been undertaken by placing a quarter-wave plate in the conventional external Fabry-Perot cavity configuration (traditionally used in coherent feedback studies), [7,13,9]. In this type of incoherent optical feedback configuration, the reflected beam's polarisation is rotated by 90° while passing twice through the quarter-wave plate.…”

Section: Introductionmentioning

confidence: 99%

“…This is because the pulses essentially build up from the off-state of the laser. Two recent publications have proposed an alternative model for incoherent external optical feedback systems employing polarisation rotation, [12,13]. These models assume that both the transverse electric (TE) and transverse magnetic (TM) are simultaneously lasing.…”

Section: Introductionmentioning

confidence: 99%

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Semiconductor lasers subject to polarization-rotated optical feedback

Hong

Spencer

2006

SPIE Proceedings

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The dynamics of a semiconductor laser subject to polarization rotated (incoherent) optical feedback have been numerical and experimental investigated. The results show that the induced dynamics can be grouped into four regimes (stable, chaotic, pulsed and two-state) and they also show that the TM mode of the laser never lases, at least in the ring cavity configuration studied. In addition, unlike the earlier short cavity work, the boundaries between the regimes in the long cavity case were found to be independent of the external cavity delay time. By focussing on the effects induced by incoherent optical feedback from long external cavities we will show that four regimes of operation can be accessed by varying the external reflectivity. Calculated Lyapunov exponents and a bifurcation diagram clearly delineate these regimes and experimental verification of the transition from stable to chaotic dynamics will be described. The dynamical behaviour exhibited in each regime will be explained in terms of the memory effect introduced by the time delay associated with the external cavity and the natural relaxation oscillations of the solitary laser. It will also be shown that within the pulsed regime the pulse repetition rate is determined by the external reflectivity and injection current and is independent of the external cavity length.

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Generation of high-speed single-wavelength optical pulses in semiconductor lasers with orthogonal-polarization optical feedback

Cited by 16 publications

References 12 publications

Square-wave switching in vertical-cavity surface-emitting lasers with polarization-rotated optical feedback: Experiments and simulations

Square-wave switching in vertical-cavity surface-emitting lasers with polarization-rotated optical feedback: Experiments and simulations

Diode laser operation under orthogonal feedback: Experiments and theory

Semiconductor lasers subject to polarization-rotated optical feedback

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