Article

Long Distance Single-mode Fiber Transmission of Multimode VCSELs by Injection Locking

Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA.
Optics Express (Impact Factor: 3.53). 09/2010; 18(20):20552-7. DOI: 10.1364/OE.18.020552
Source: PubMed

ABSTRACT We report greatly enhanced transmission distance of multimode vertical-cavity surface-emitting lasers (MM-VCSELs) over standard single-mode fiber using optical injection locking. Transmission distance as high as 90 km is achieved at 10 Gb/s by frequency chirp inversion and higher order transverse mode suppression.

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Available from: Bo Zhang, Dec 23, 2014
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    • "If light emitted by another laser is injected to a VCSEL, its operational characteristics can be improved. External optical injection can be used to reduce the laser linewidth or the mode partition noise, for example, or for enhancing the modulation bandwidth [8] [9] [10] [11]. It is important to remark that with this technique these improvements are reached without modifying the laser design. "
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    ABSTRACT: We present a theoretical and experimental study of the polarization-resolved nonlinear dynamics of a 1550nm single-mode linearly polarized VCSEL when subject to orthogonal optical injection. Anticorrelated (correlated) dynamics between the two linear polarizations emitted by the VCSEL is found for negative (positive) frequency detuning. Our theoretical analysis show that deterministic dynamics with appreciable values of the standard deviation of the period of the signal can be found for negative values of the frequency detuning. We study the effect of spontaneous emission noise on the dynamics by analyzing the dependence of the average and standard deviation of the interpulse time on the injected power. We find that in general the effect of spontaneous emission noise is to increase the standard deviation of the interpulse time.
    Proceedings of SPIE - The International Society for Optical Engineering 05/2012; DOI:10.1117/12.922549 · 0.20 Impact Factor
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    • "is also commonly employed to improve the performance of VCSELs without modifying their design [11]–[13]. Emission in multiple transverse and polarization modes is usually found in VCSELs. The injection locking of VCSELs has been examined experimentally [14]–[20] and theoretically [21], [22] in single and multitransverse mode VCSELs taking into account the polarization additional degree of freedom. "
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    ABSTRACT: We have analyzed experimentally the optical power polarization bistability induced in a long-wavelength multitransverse mode vertical-cavity surface-emitting laser (VCSEL) under orthogonal optical injection. Bistability with very wide hysteresis cycles is measured for both the fundamental and the high-order transverse mode of the device. The shape of the associated hysteresis cycle is different for each of the two transverse modes. The power of the parallel polarized high-order (fundamental) transverse mode remains constant (gradually decreases) as the injected power is increased. Both powers suddenly drop to low levels at large values of the injected power. The squared shape measured for the input/output characteristic of the high-order transverse mode is of particular interest for obtaining good quality all-optical inversion and all-optical regeneration for use in optical telecommunication networks.
    IEEE Journal of Selected Topics in Quantum Electronics 03/2012; 18(2):772-778. DOI:10.1109/JSTQE.2011.2156385 · 3.47 Impact Factor
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    • "The performance of VCSELs can be improved by injecting light emitted by another laser. The optical injection technique can be used for reducing the laser linewidth, the mode partition noise or for enhancing the modulation bandwidth without modifying the semiconductor laser design [8] [9] [10] [11]. Optical injection in VCSELs is also interesting from the fundamental point of view because a wealth of complex nonlinear dynamics and bifurcations are obtained. "
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    ABSTRACT: We report an experimental study of the polarization-resolved nonlinear dynamics of a 1550nm single-mode linearly polarized VCSEL when subject to orthogonal optical injection. We measure high-resolution (10 MHz) optical spectra of the linear polarizations and the total power emitted by the VCSEL. Spectra are analyzed together with the simultaneous temporal series of linearly polarized powers. For periodic dynamics, both linear polarizations show spectra with equally spaced peaks with a separation that corresponds to the frequency detuning. As the injected power increases much more peaks are observed with larger (smaller) separation between them when the frequency detuning is positive (negative). For negative values of the frequency detuning, increasing the injected power leads to irregular dynamics that is characterized by optical spectra for both linear polarizations with broad pedestals and much less defined peaks specially for the parallel polarization.
    Proceedings of SPIE - The International Society for Optical Engineering 02/2012; DOI:10.1117/12.907106 · 0.20 Impact Factor
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