Compal Electronics, Inc.

National Taipei University of Technology

Chia-Wei Huang

Ming-Chung Liu

Hong-Tien Wang

Hsing-Yi Kao

Chien-Ming Chen

Yu-Hsin Chen

Jhang-Rong Jiang

Yin-Wen Lee

Shih-Ken Chen

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A passively Q-switched fiber laser system comprises a pump source and an ring cavity connected with each other. The ring cavity comprises a gain fiber, a directional coupler and a saturable absorber connected in order. The saturable absorber is a quantum-dot polymer composite film, which is fabricated by a simple method comprising steps of: mixing a quantum dot material of lead sulfide (PbS) with a colloidal polymer to form a mixture; and drying the mixture at two different temperatures in two stages respectively. The saturable absorber of the present invention has lower saturating intensity and a plurality of absorption bands comprising 1000 nm to 1100 nm and 1500 nm to 1600 nm. The maximum output power and the maximum pulse energy of the passively Q-switched fiber laser system can be superior to those laser systems using the quantum-dot (QD) polymer composite film as saturable absorber.

Passively Q-switched fiber laser system and method for fabricating a saturable absorber of the system

Growing community of inventors

Taipei, Taiwan

Chia-Wei Huang