Silver Nanoplate Composites as Nonlinear Saturable Absorbers for a Q-Switched Laser
Wenhao Lyu,
Yuan Cheng,
Jiayi An,
Marcello Condorelli,
Mario Pulvirenti,
Giuseppe Compagnini,
Xiaogang Wang,
Bo Fu,
Vittorio Scardaci
Affiliations
Wenhao Lyu
School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
Yuan Cheng
School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
Jiayi An
School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
Marcello Condorelli
Dipartimento di Scienze Chimiche, Universitá Degli Studi di Catania, 95125 Catania, Italy
Mario Pulvirenti
Dipartimento di Scienze Chimiche, Universitá Degli Studi di Catania, 95125 Catania, Italy
Giuseppe Compagnini
Dipartimento di Scienze Chimiche, Universitá Degli Studi di Catania, 95125 Catania, Italy
Xiaogang Wang
Key Laboratory of Big Data-Based Precision Medicine Ministry of Industry and Information Technology, School of Engineering Medicine, Beihang University, Beijing 100191, China
Bo Fu
School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
Vittorio Scardaci
Dipartimento di Scienze Chimiche, Universitá Degli Studi di Catania, 95125 Catania, Italy
Metal nanomaterials have promising applications in ultrafast photonics due to their broadband operation, large third-order nonlinear susceptibility, and ultrafast recovery time. We realized a Q-switched pulsed erbium-doped fiber laser based on a silver nanoplate polyvinyl alcohol film as a saturable absorber. This film, with a modulation depth of 15.7%, was integrated into a fiber laser by means of a sandwich structure. We obtained Q-switched pulses in the 1.5-μm band, which plays an important role in telecommunications and atmospheric detection. Stable Q-switched pulses were obtained at the pump power of 135 mW, with a single pulse energy of 33.8 nJ, a pulse width of 2.3 μs, a repetition rate of 62.4 kHz, and a signal-to-noise ratio of about 45 dB. When increasing the pump power up to a maximum value of 246 mW, the maximum single pulse energy of 57.8 nJ was achieved. This study first demonstrates the potential of silver nanoplates as saturable absorbers in generating stable laser pulses with high energy.
