Low-Cost Fiber Grating Laser Module Package Employing a Hyperbolic Fiber Microlens

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概要

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• In this study, we demonstrate that it is possible to fabricate a fiber grating external cavity laser (FGECL) module with a low cost while still maintaining a good performance using a low-cost antireflection (AR)-coated ($5\times 10^{-3}$) laser and a tapered hyperbolic-end fiber (THEF) microlens. Previously, high-performance FGECL modules have only been available by using a complicated AR-coated ($1\times 10^{-5}$) laser process that leads to a high packaging cost. Our FGECL consisted of a HR/AR-coated diode laser, a THEF microlens, and a fiber grating. The results showed that the FGECL module exhibits a side-mode suppression ratio (SMSR) higher than 44 dB, a higher output power of more than 2 mW, and a larger operation current range of over 50 mA. In addition, excellent wavelength stability and a low-penalty directly modulated 2.488 Gbit/s were also obtained for FGECL modules. The THEF microlens demonstrated up to 86% coupling efficiency for a laser with an aspect ratio of $1:1.5$. Low-cost FGECL modules with good performance were achieved primarily owing to the THEF microlens having a high coupling efficiency (typically 75%) which enhanced the feedback power from the fiber grating external cavity to the HR/AR-coated laser compared with the currently available hemispherical microlens which has low coupling efficiency (typically 50%). Therefore, the packaged FGECL module is suitable for use in low cost 2.5 Gbit/s lightwave transmission systems.

• 2007-03-15

著者

• Lee Chao-wei

  Institute Of Electro-optical Engineering National Sun Yat-sen University

• YANG Huei-Min

  Department of Communication Engineering, I-SHOU University

• TSAI Zong-Jin

  Institute of Electro-Optical Engineering, National Sun Yat-sen University

• Cheng Wood-hi

  Institute Of Electro-optical Engineering National Sun Yat-sen University

• Chen Ming-hung

  Institute Of Electro-optical Engineering National Sun Yat-sen University

• Cheng Wood-Hi

  Institute of Electro-Optical Engineering, National Sun Yat-sen University, Taiwan 804

• Chen Ming-Hung

  Institute of Electro-Optical Engineering, National Sun Yat-sen University, Taiwan 804

• Lee Chao-Wei

  Institute of Electro-Optical Engineering, National Sun Yat-sen University, Taiwan 804

• Yang Huei-Min

  Department of Communication Engineering, I-SHOU University, Kaohsiung, Taiwan 840

• Tsai Zong-Jin

  Institute of Electro-Optical Engineering, National Sun Yat-sen University, Taiwan 804

関連論文

• Low-Cost Fiber Grating Laser Module Package Employing a Hyperbolic Fiber Microlens
• 1.55-μm Fiber Grating Laser Utilizing an Uncoated Tapered Hemispherical-End Fiber Microlens
• A Quantitative Postweld Shift Measurement and Compensation Technique in Butterfly Laser Module Packages
• Low-Cost Fiber Grating Laser Module Package Employing a Hyperbolic Fiber Microlens
• 1.55-μm Fiber Grating Laser Utilizing an Uncoated Tapered Hemispherical-End Fiber Microlens

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