| Presentation | 2009-05-22 Progress in Distributed-Reflector (DR) Lasers with Wirelke Active Regions : Low threshold, high efficiency, and strong durability against reflected waves Takahiko SHINDO, SeungHun LEE, Noriaki TAJIMA, Daisuke TAKAHASHI, Nobuhiko NISHIYAMA, Shigehisa ARAI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have demonstrated low-threshold and a high efficiency distributed reflector (DR) laser with wirelike active regions as well as its high single-mode stability. From theoretical investigations, we confirmed that much lower threshold current operation can be realized by introducing a phase-shift region in the active DFB section, and achieved low threshold current operation with phase-shifted DR laser Furthermore we reduced the waveguide loss by reducing the doping concentration of n-InP layer in the embedding growth process, and achieved much higher differential quantum efficiency. Required currents for 1-mW output power of 4.2 and 3.6-mA were obtained for uniform and phase-shifted DR lasers, respectively. Furthermore the durability against reflected waves of the DR laser was evaluated by measuring the relative intensity noise (RIN). As the result an isolator-free 10-km transmission by 2.5Gb/s directly modulated DR laser was demonstrated for optical feedback power of -13.5dB with a low power penalty of 2dB. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Distributed-Reflector (DR) Laser / Distributed-Feedback (DFB) Laser / Durability against reflected waves |
| Paper # | LQE2009-3 |
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| Committee | LQE |
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| Conference Date | 2009/5/15(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Lasers and Quantum Electronics (LQE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Progress in Distributed-Reflector (DR) Lasers with Wirelke Active Regions : Low threshold, high efficiency, and strong durability against reflected waves |
| Sub Title (in English) | |
| Keyword(1) | Distributed-Reflector (DR) Laser |
| Keyword(2) | Distributed-Feedback (DFB) Laser |
| Keyword(3) | Durability against reflected waves |
| 1st Author's Name | Takahiko SHINDO |
| 1st Author's Affiliation | Tokyo Institeute of Technology Quantum Nono Electronis Research Center:Dept. of Electrical and Electronic Engineering() |
| 2nd Author's Name | SeungHun LEE |
| 2nd Author's Affiliation | Tokyo Institeute of Technology Quantum Nono Electronis Research Center:Dept. of Electrical and Electronic Engineering |
| 3rd Author's Name | Noriaki TAJIMA |
| 3rd Author's Affiliation | Tokyo Institeute of Technology Quantum Nono Electronis Research Center:Dept. of Electrical and Electronic Engineering |
| 4th Author's Name | Daisuke TAKAHASHI |
| 4th Author's Affiliation | Tokyo Institeute of Technology Quantum Nono Electronis Research Center:Dept. of Electrical and Electronic Engineering |
| 5th Author's Name | Nobuhiko NISHIYAMA |
| 5th Author's Affiliation | Dept. of Electrical and Electronic Engineering |
| 6th Author's Name | Shigehisa ARAI |
| 6th Author's Affiliation | Tokyo Institeute of Technology Quantum Nono Electronis Research Center:Dept. of Electrical and Electronic Engineering |
| Date | 2009-05-22 |
| Paper # | LQE2009-3 |
| Volume (vol) | vol.109 |
| Number (no) | 49 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |