Laser Cavities

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Oskar Painter - One of the best experts on this subject based on the ideXlab platform.

  • ultrasmall microfabricated Laser Cavities
    2013
    Co-Authors: Oskar Painter, Eli Yablonovitch, Axel Scherer
    Abstract:

    Abstract : Established cavity designs for commercial semiconductor Lasers are mostly based on Fabry-Perot etalons for edge or surface emission. Similar to the trend of miniaturization of integrated electronics, there is a quest to shrink the size of semiconductor Lasers, in order to pack more devices on less material and in the hope of modifying the Laser efficiency with control over spontaneous emission in tiny Cavities. In this program, we have used microdisk, vertical-cavity and photonic crystal Cavities to confine light into smaller and smaller volumes.

  • design of mid ir and thz quantum cascade Laser Cavities with complete tm photonic bandgap
    International Quantum Electronics Conference, 2007
    Co-Authors: Michael Bahriz, V Moreau, R Colombelli, Orion Crisafulli, Oskar Painter
    Abstract:

    The use of a connected honeycomb lattice for creating 2D photonic crystal QC Laser structures is presented in this study. Full three-dimensional finite-difference time-domain simulations are used to analyze the properties of the honeycomb lattice in the two cases of realistic mid-IR and THz QC Laser structures. A surface plasmon QC Laser structure and a metal-metal waveguide geometry are considered in the mid-IR and the THz range, respectively.

  • design of mid ir and thz quantum cascade Laser Cavities with complete tm photonic bandgap
    Optics Express, 2007
    Co-Authors: Michael Bahriz, V Moreau, R Colombelli, Orion Crisafulli, Oskar Painter
    Abstract:

    We present the design of mid-infrared and THz quantum cascade Laser Cavities formed from planar photonic crystals with a complete in-plane photonic bandgap. The design is based on a honeycomb lattice, and achieves a full in-plane photonic gap for transverse-magnetic polarized light while preserving a connected pattern for efficient electrical injection. Candidate defects modes for lasing are identified. This lattice is then used as a model system to demonstrate a novel effect: under certain conditions -that are typically satisfied in the THz range - a complete photonic gap can be obtained by the sole patterning of the top metal contact. This possibility greatly reduces the required fabrication complexity and avoids potential damage of the semiconductor active region.

Kent D Choquette - One of the best experts on this subject based on the ideXlab platform.

  • push pull modulation of a composite resonator vertical cavity Laser
    IEEE Journal of Quantum Electronics, 2010
    Co-Authors: Chen Chen, Klein Johnson, Mary K Hibbsbrenner, Kent D Choquette
    Abstract:

    The two coupled optical Cavities within a vertical-cavity surface-emitting Laser have the unique ability to modulate the spatial distribution of the longitudinal optical mode, without changing the total photon density in the Laser Cavities, by simultaneously directly modulating the two optical Cavities exactly out-of-phase. A rate-equation analysis predicts that this condition, which we term push-pull modulation, exhibits a superior modulation response than that of conventional direct modulation. The push-pull modulation can enable high-speed operation with low power consumption, as a large modulation bandwidth can be achieved independent of the total photon density and/or the injection dc current. Experimental evidence of spatially changing the longitudinal mode is presented, and push-pull modulation at 2.5 Gb/s is demonstrated for the first time.

  • coherent coupling of two dimensional arrays of defect Cavities in photonic crystal vertical cavity surface emitting Lasers
    Applied Physics Letters, 2005
    Co-Authors: J J Raftery, Aaron J Danner, Kent D Choquette
    Abstract:

    An approach for creating two-dimensional arrays of coherently coupled vertically emitting Laser Cavities is demonstrated. This is achieved by creating a 2×2 array of defect Cavities within the top distributed Bragg reflector of a photonic crystal vertical cavity surface-emitting Laser. The optical coupling occurs laterally through coupling regions defined between the defect Cavities. Modifying the index within the coupling regions, accomplished by varying the hole parameters of the photonic crystal in those regions, leads to out-of-phase coherent coupling observed in the far field. Agreement is found between the simulated and observed out-of-phase far fields.

Dingyuan Tang - One of the best experts on this subject based on the ideXlab platform.

  • mechanically exfoliated black phosphorus as a new saturable absorber for both q switching and mode locking Laser operation
    Optics Express, 2015
    Co-Authors: Yu Chen, Guobao Jiang, Shuqing Chen, Zhinan Guo, Chujun Zhao, Han Zhang, Qiaoliang Bao, Shuangchun Wen, Dingyuan Tang, Dianyuan Fan
    Abstract:

    Black phosphorus (BP), an emerging narrow direct band-gap two-dimensional (2D) layered material that can fill the gap between the semi-metallic graphene and the wide-bandgap transition metal dichalcogenides (TMDs), had been experimentally found to exhibit the saturation of optical absorption if under strong light illumination. By taking advantage of this saturable absorption property, we could fabricate a new type of optical saturable absorber (SA) based on mechanically exfoliated BPs, and further demonstrate the applications for ultra-fast Laser photonics. Based on the balanced synchronous twin-detector measurement method, we have characterized the saturable absorption property of the fabricated BP-SAs at the telecommunication band. By incorporating the BP-based SAs device into the all-fiber Erbium-doped fiber Laser Cavities, we are able to obtain either the passive Q-switching (with maximum pulse energy of 94.3 nJ) or the passive mode-locking operation (with pulse duration down to 946 fs). Our results show that BP could also be developed as an effective SA for pulsed fiber or solid-state Lasers.

  • mechanically exfoliated black phosphorus as a new saturable absorber for both q switching and mode locking Laser operation
    Optics Express, 2015
    Co-Authors: Yu Chen, Guobao Jiang, Shuqing Chen, Zhinan Guo, Chujun Zhao, Han Zhang, Qiaoliang Bao, Shuangchun Wen, Xuefeng Yu, Dingyuan Tang
    Abstract:

    Black phosphorus (BP), an emerging narrow direct band-gap two-dimensional (2D) layered material that can fill the gap between the semi-metallic graphene and the wide-bandgap transition metal dichalcogenides (TMDs), had been experimentally found to exhibit the saturation of optical absorption if under strong light illumination. By taking advantage of this saturable absorption property, we could fabricate a new type of optical saturable absorber (SA) based on mechanically exfoliated BPs, and further demonstrate the applications for ultra-fast Laser photonics. Based on the balanced synchronous twin-detector measurement method, we have characterized the saturable absorption property of the fabricated BP-SAs at the telecommunication band. By incorporating the BP-based SAs device into the all-fiber Erbium-doped fiber Laser Cavities, we are able to obtain either the passive Q-switching (with maximum pulse energy of 94.3 nJ) or the passive mode-locking operation (with pulse duration down to 946 fs). Our results show that BP could also be developed as an effective SA for pulsed fiber or solid-state Lasers.

Michael Bahriz - One of the best experts on this subject based on the ideXlab platform.

  • design of mid ir and thz quantum cascade Laser Cavities with complete tm photonic bandgap
    International Quantum Electronics Conference, 2007
    Co-Authors: Michael Bahriz, V Moreau, R Colombelli, Orion Crisafulli, Oskar Painter
    Abstract:

    The use of a connected honeycomb lattice for creating 2D photonic crystal QC Laser structures is presented in this study. Full three-dimensional finite-difference time-domain simulations are used to analyze the properties of the honeycomb lattice in the two cases of realistic mid-IR and THz QC Laser structures. A surface plasmon QC Laser structure and a metal-metal waveguide geometry are considered in the mid-IR and the THz range, respectively.

  • design of mid ir and thz quantum cascade Laser Cavities with complete tm photonic bandgap
    Optics Express, 2007
    Co-Authors: Michael Bahriz, V Moreau, R Colombelli, Orion Crisafulli, Oskar Painter
    Abstract:

    We present the design of mid-infrared and THz quantum cascade Laser Cavities formed from planar photonic crystals with a complete in-plane photonic bandgap. The design is based on a honeycomb lattice, and achieves a full in-plane photonic gap for transverse-magnetic polarized light while preserving a connected pattern for efficient electrical injection. Candidate defects modes for lasing are identified. This lattice is then used as a model system to demonstrate a novel effect: under certain conditions -that are typically satisfied in the THz range - a complete photonic gap can be obtained by the sole patterning of the top metal contact. This possibility greatly reduces the required fabrication complexity and avoids potential damage of the semiconductor active region.

Yu Chen - One of the best experts on this subject based on the ideXlab platform.

  • mechanically exfoliated black phosphorus as a new saturable absorber for both q switching and mode locking Laser operation
    Optics Express, 2015
    Co-Authors: Yu Chen, Guobao Jiang, Shuqing Chen, Zhinan Guo, Chujun Zhao, Han Zhang, Qiaoliang Bao, Shuangchun Wen, Dingyuan Tang, Dianyuan Fan
    Abstract:

    Black phosphorus (BP), an emerging narrow direct band-gap two-dimensional (2D) layered material that can fill the gap between the semi-metallic graphene and the wide-bandgap transition metal dichalcogenides (TMDs), had been experimentally found to exhibit the saturation of optical absorption if under strong light illumination. By taking advantage of this saturable absorption property, we could fabricate a new type of optical saturable absorber (SA) based on mechanically exfoliated BPs, and further demonstrate the applications for ultra-fast Laser photonics. Based on the balanced synchronous twin-detector measurement method, we have characterized the saturable absorption property of the fabricated BP-SAs at the telecommunication band. By incorporating the BP-based SAs device into the all-fiber Erbium-doped fiber Laser Cavities, we are able to obtain either the passive Q-switching (with maximum pulse energy of 94.3 nJ) or the passive mode-locking operation (with pulse duration down to 946 fs). Our results show that BP could also be developed as an effective SA for pulsed fiber or solid-state Lasers.

  • mechanically exfoliated black phosphorus as a new saturable absorber for both q switching and mode locking Laser operation
    Optics Express, 2015
    Co-Authors: Yu Chen, Guobao Jiang, Shuqing Chen, Zhinan Guo, Chujun Zhao, Han Zhang, Qiaoliang Bao, Shuangchun Wen, Xuefeng Yu, Dingyuan Tang
    Abstract:

    Black phosphorus (BP), an emerging narrow direct band-gap two-dimensional (2D) layered material that can fill the gap between the semi-metallic graphene and the wide-bandgap transition metal dichalcogenides (TMDs), had been experimentally found to exhibit the saturation of optical absorption if under strong light illumination. By taking advantage of this saturable absorption property, we could fabricate a new type of optical saturable absorber (SA) based on mechanically exfoliated BPs, and further demonstrate the applications for ultra-fast Laser photonics. Based on the balanced synchronous twin-detector measurement method, we have characterized the saturable absorption property of the fabricated BP-SAs at the telecommunication band. By incorporating the BP-based SAs device into the all-fiber Erbium-doped fiber Laser Cavities, we are able to obtain either the passive Q-switching (with maximum pulse energy of 94.3 nJ) or the passive mode-locking operation (with pulse duration down to 946 fs). Our results show that BP could also be developed as an effective SA for pulsed fiber or solid-state Lasers.