Stability of a monolithic integrated filtered-feedback laser

Zhao, Jing; Lenstra, D.; Santos, R.; Wale, M.J.; Smit, Meint Meint; Leijtens, X.J.M.

doi:10.1364/oe.20.00b270

Cited by 22 publications

(14 citation statements)

References 9 publications

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“…There can be several reasons for applying optical feedback (OFB) to the laser. In the past OFB was particularly used for line-width narrowing 1 and modification of output-noise properties 2 ; later studies on unstable behavior 3 and chaotic dynamics 4 followed, while recently filtered feedback 5 from an arrayed-waveguide reflector 6 has been used for mode selection in a monolithically integrated semiconductor laser 7 .…”

Section: Introductionmentioning

confidence: 99%

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Relaxation-oscillation-free semiconductor laser with optical feedback

Lenstra

2014

SPIE Proceedings

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Semiconductor lasers often make use of external optical feedback, for various reasons, like single-mode selection, stabilization or linewidth narrowing. A draw-back of such method is that delayed feedback can easily lead to sustained relaxation oscillations (RO). The occurrence of the RO is sensitive to, among other things, the applied settings of the phase of the feedback light. It is known from early studies that the onset of ROs already occurs with weak feedback. However, the onset of ROs is shifted to higher feedback strengths under resonance conditions, i.e. when the product of RO-frequency and external delay time equals an integer. This finding was based upon certain numerical and analytical considerations, but no simple explanation was given. From a theoretical analysis based on the Lang and Kobayashi equations, the existence of RO-free bias-current intervals of substantial width will be demonstrated for realistic pumping values, irrespective of the feedback phase. It will be shown that for conventional semiconductor lasers with weak optical feedback under RO-resonance condition the laser with feedback behaves as if no feedback is present. Therefore, under these conditions the RO is damped, hence will be suppressed. This result is valid in the regime of sufficiently weak feedback, such that the RO frequency is not deviating significantly from its value in the solitary laser and is supported by calculations of the RIN spectrum.

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Section: Introductionmentioning

confidence: 99%

“…This phase dependence was experimentally studied by implementing electrically addressable phase shifters 7,11 . It was also known that the critical feedback level for onset of the relaxation oscillation, i.e.…”

Section: Introductionmentioning

confidence: 99%

Relaxation-oscillation-free semiconductor laser with optical feedback

Lenstra

2014

SPIE Proceedings

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“…The filtered feedback effect can yield very narrow linewidth, and linewidths as low as 150kHz have been measured. Simultaneous lasing on four channels 200GHz apart is reported12,13 , with SMSR>40dB.…”

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confidence: 91%

Laser research on an InP-based generic integration platform

et al. 2014

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In Europe a number of technology platforms for generic integration are being created for photonic integrated circuits (PICs); in Silicon, in passive dielectrics, and in Indium Phosphide. Such platforms are on the brink of commercialization, they offer a range of calibrated building blocks from which application specific PICs can be built and allow simplified, reduced cost access to a standardised technology, but presently only InP based platforms allow the integration of optical gain blocks; the essential feature of a semiconductor laser. The wavelength is constrained by the platform, usually Cband, but in the near future we expect other wavelengths in the 1.3µm-2.0µm range will be addressed.A frozen platform technology may not seem an ideal starting point for novel laser research but for what may be appear to be lost in epitaxial and process flexibility, much more is gained through a new-found ability to build up complex circuits quickly to deliver new and interesting laser based functionality. Building blocks such as reflectors (a distributed Bragg reflector (DBR) or a multimode interference reflector (MIR)), an amplifier section, and passive waveguides, can be built up by designers into integrated semiconductor lasers of a wide variety of types. This ready integration of novel sources with other circuit functionality can address a wide range of applications in telecoms, datacoms, and fibre based sensing systems.In this paper we describe a number of recent developments on generic InP-based platforms ranging from the fabrication of simple Fabry-Perot lasers, through tuneable DBR lasers, multi-wavelength comb lasers, picosecond pulse lasers and ring lasers.

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“…This is already achieved for a feedback level as low as 1% in power. The individual phase shifters are needed to control the absolute external feedback phase j with accurate precision within a 2π interval, which was proven to be essential for stable narrow-linewidth (150 kHz) operation [6]. In fact, under the above conditions of weak feedback, j regions of stability form isolated subsets on the 2π interval with stability boundaries corresponding to the generation of feedbackinduced sustained relaxation oscillations [6].…”

Section: Introductionmentioning

confidence: 99%

Lasers in InP generic photonic integration technology platforms

Latkowski

Lenstra

2015

Advanced Optical Technologies

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A review is given of a number of lasers in a form of photonic integrated circuits realized on InP substrate using a generic integration approach. The potential of these photonic circuits lies in their compactness, low power consumption, and significant reduction of fabrication cost by realization in generic foundry runs. Generic integration platforms offer the possibility of realizing functionally advanced photonic circuits using combinations of just a few standardized and parameterized building blocks. This vibrant field opens new doors to innovative product development for SMEs as well as curiosity-driven research.

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Stability of a monolithic integrated filtered-feedback laser

Cited by 22 publications

References 9 publications

Relaxation-oscillation-free semiconductor laser with optical feedback

Relaxation-oscillation-free semiconductor laser with optical feedback

Laser research on an InP-based generic integration platform

Lasers in InP generic photonic integration technology platforms

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