Electronically Tunable Distributed Feedback (DFB) Laser on Silicon

Dhoore, Sören; Köninger, Anna; Meyer, Ralf; Roelkens, Günther; Morthier, Geert

doi:10.1002/lpor.201800287

Cited by 23 publications

(9 citation statements)

References 32 publications

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“…Most often, frequency tuning of integrated lasers relies on the thermo-optic (TO) effect 10 , which is relatively slow (kHz-level speed). And even while MHz-level frequency tuning can be achieved by current sweep of PN junctions of III-V or silicon waveguides, this carrier-induced effect produces unwanted intensity modulation 29 as well as additional loss that are not compatible with narrow linewidth lasers. As a result, currently in integrated photonics, frequency modulation of laser has to rely on a modulator that is external to the laser 30 – 34 or optical pumping 35 – 39 .…”

Section: Introductionmentioning

confidence: 99%

Integrated Pockels laser

Chang

et al. 2022

Nat Commun

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The development of integrated semiconductor lasers has miniaturized traditional bulky laser systems, enabling a wide range of photonic applications. A progression from pure III-V based lasers to III-V/external cavity structures has harnessed low-loss waveguides in different material systems, leading to significant improvements in laser coherence and stability. Despite these successes, however, key functions remain absent. In this work, we address a critical missing function by integrating the Pockels effect into a semiconductor laser. Using a hybrid integrated III-V/Lithium Niobate structure, we demonstrate several essential capabilities that have not existed in previous integrated lasers. These include a record-high frequency modulation speed of 2 exahertz/s (2.0 × 1018 Hz/s) and fast switching at 50 MHz, both of which are made possible by integration of the electro-optic effect. Moreover, the device co-lases at infrared and visible frequencies via the second-harmonic frequency conversion process, the first such integrated multi-color laser. Combined with its narrow linewidth and wide tunability, this new type of integrated laser holds promise for many applications including LiDAR, microwave photonics, atomic physics, and AR/VR.

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Section: Introductionmentioning

confidence: 99%

Integrated Pockels laser

Chang

et al. 2022

Nat Commun

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“…Most often, frequency tuning of integrated lasers relies on the thermo-optic (TO) effect [10], which is relatively slow (kHz-level speed). And even while MHz-level frequency tuning can be achieved by current sweep of PN junctions of III-V or silicon waveguides, this carrierinduced effect produces unwanted intensity modulation [27] as well as additional loss that are not compatible with narrow linewidth lasers . This limitation is more severe at short wavelength below silicon's bandgap wavelength, where currently only thermal tuning can be used for external cavities of integrated lasers.…”

Section: Introductionmentioning

confidence: 99%

Integrated Pockels Laser

Li,

Chang,

et al. 2022

Preprint

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The development of integrated semiconductor lasers has miniaturized traditional bulky laser systems, enabling a wide range of photonic applications. A progression from pure III-V based lasers to III-V/external cavity structures has harnessed low-loss waveguides in different material systems, leading to significant improvements in laser coherence and stability. Despite these successes, however, key functions remain absent. In this work, we address a critical missing function by integrating the Pockels effect into a semiconductor laser. Using a hybrid integrated III-V/Lithium Niobate structure, we demonstrate several essential capabilities that have not existed in previous integrated lasers. These include a record-high frequency modulation speed of 2 exahertz/s (2.0×10 18 Hz/s) and fast switching at 50 MHz, both of which are made possible by integration of the electro-optic effect. Moreover, the device co-lases at infrared and visible frequencies via the second-harmonic frequency conversion process, the first such integrated multi-color laser. Combined with its narrow linewidth and wide tunability, this new type of integrated laser holds promise for many applications including LiDAR, microwave photonics, atomic physics, and AR/VR.

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“…In other work, researchers have also altered the ambient temperature [ 29 ] and medium [ 34 ] to affect the laser emission. In addition, some researchers have shown that electronically tunable distributed feedback (DFB) lasers can be achieved through electroactive dielectric elastomer actuators [ 35 ] and III–V InGaAsP tuning layers [ 36 ]. To date, there have been a few studies on WGM electrical tuning; microstructural fibers based on dual-frequency liquid crystal (DFLCs) [ 37 ] and metal-dielectric core–shell hybrid microcavities with thermo-optical effects [ 38 ] provide WGM tuning schemes for wavelength shifting by applied electric fields.…”

Section: Introductionmentioning

confidence: 99%

Electrically Tunable Polymer Whispering-Gallery-Mode Laser

Liu

Tong

et al. 2022

Materials

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Microlasers hold great promise for the development of photonics and optoelectronics. At present, tunable microcavity lasers, especially regarding in situ dynamic tuning, are still the focus of research. In this study, we combined a 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) piezoelectric crystal with a Poly [9,9-dioctylfluorenyl-2,7-diyl] (PFO) microring cavity to realize a high-quality, electrically tunable, whispering-gallery-mode (WGM) laser. The dependence of the laser properties on the diameter of the microrings, including the laser spectrum and quality (Q) value, was investigated. It was found that with an increase in microring diameter, the laser emission redshifted, and the Q value increased. In addition, the device effectively achieved a blueshift under an applied electric field, and the wavelength tuning range was 0.71 nm. This work provides a method for in situ dynamic spectral modulation of microcavity lasers, and is expected to provide inspiration for the application of integrated photonics technology.

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Electronically Tunable Distributed Feedback (DFB) Laser on Silicon

Cited by 23 publications

References 32 publications

Integrated Pockels laser

Integrated Pockels laser

Integrated Pockels Laser

Electrically Tunable Polymer Whispering-Gallery-Mode Laser

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