Passively Q-switched erbium-doped fiber laser using quantum dots CdSe embedded in polymer film as saturable absorber

Journal Article · Sat Jun 15 04:00:00 EDT 2019 · Optical and Quantum Electronics

DOI:https://doi.org/10.1007/S11082-019-1897-6· OSTI ID:22950247

Ismail, E. I.; Kadir, N. A. A. ^[1]; Latiff, A. A. ^[2]; Arof, H.

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1. University of Malaya, Department of Electrical Engineering (Malaysia)
2. Universiti Teknikal Malaysia Melaka, Centre of Telecommunication Research and Innovation (Malaysia)

We demonstrate a passively Q-switched erbium doped fiber laser (EDFL) based on quantum dots (QD) CdSe as a saturable absorber (SA). The synthesized CdSe powder was embedded into a poly(methyl methacrylate) (PMMA) using emulsion polymerization process. The film is sandwiched between two fiber connector via an adapter to form a fiber-compatible SA device. By integrating the SA device into the EDFL ring cavity, the stable Q-switched operation is achieved at 1559.35 nm as the pump power is varied within 30–118 mW. The laser has a pump threshold of 20.4 mW. The pulse repetition rate shows an increasing trend from 33.2 to 68.45 kHz, whereas the pulse width exhibits a decreasing trend from 10.04 to 4.30 μs as the pump power is increased from 30 to 118 mW. The highest pulse energy of 11.83 nJ is obtained at a pump power of 118 mW. These results indicate that QD CdSe is a promising SA for Q-switching laser operation.

• OSTI ID: 22950247
• Journal Information: Optical and Quantum Electronics, Journal Name: Optical and Quantum Electronics Journal Issue: 6 Vol. 51; ISSN OQELDI; ISSN 0306-8919
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONNECTORS
DOPED MATERIALS
EMULSIONS
ERBIUM
FIBERS
FILMS
KHZ RANGE
LASERS
METHACRYLIC ACID ESTERS
PMMA
POLYMERIZATION
PULSES
Q-SWITCHING
QUANTUM DOTS