Harmonic Mode-Locked Fiber Laser based on Photonic Crystal Fiber Filled with Topological Insulator Solution

Abstract

We reported that the photonic crystal fiber (PCF) filled with TI:Bi2Te3 nanosheets solution could act as an effective saturable absorber (SA). Employing this TI-PCF SA device; we constructed an ytterbium-doped all-fiber laser oscillator and achieved the evanescent wave mode-locking operation. Due to the large cavity dispersion; the fundamental mode-locking pulse had the large full width at half maximum (FWHM) of 2.33 ns with the repetition rate of ~1.11 MHz; and the radio frequency (RF) spectrum with signal-to-noise ratio (SNR) of 61 dB. In addition; the transition dynamics from a bunched state of pulses to harmonic mode-locking (HML) was also observed; which was up to 26th order.

A Highly Sensitive Gold-Coated Photonic Crystal Fiber Biosensor Based on Surface Plasmon Resonance

“…In case of the proposed PCF, a large solid silica surface will be formed outside of the cladding. This is the similar phenomenon as illustrated in [30]. Later on, by polishing the PCF surface we can achieve the proposed PCF.…”

Emerging Mono‐Elemental Bismuth Nanostructures: Controlled Synthesis and Their Versatile Applications

“…[174][175][176][177][178][179][180] The design of a large number of nanomaterials with heterojunctions in the interface between two different crystalline regions is indeed playing a vital role in the advanced materials for high-performance device applications. [181][182][183][184][185][186][187][188] Benefiting from the facilely controlled morphology and thickness-dependent bandgap, the synthetic approaches and versatile applications of Bi-based alloys and heterojunctions have quickly launched up in recent years. [182,189,190] For example, Zhang et al [191] reported the rational design and successful synthesis of a Bi-1,3,5benzenetricarboxylate (BTC) metal-organic framework (MOF), named by MOF-836.…”

High-Density Well-Aligned Single-Walled Carbon Nanotubes for Application as a Saturable Absorber with a High-Pass Filter Effect in an Erbium-Doped Ultra-Short-Pulse Fiber Laser

“…It is worth noting that the resulting signal-to-noise ratio is quite high for such systems. 34,35 As can be seen from the data in the insets in Figure 5a,b, when a module containing a saturable absorber film based on high-density nanostructures was introduced into the cavity, the signal-to-noise ratio increased by 3.7 dB, which is a significant improvement of ML operation. In addition, the high signal-tonoise ratio at the fundamental frequency and the absence of any Q-switching sidebands in the RF spectrum prove the pulse-to-pulse mode-locking stability in both cases.…”

“…2 MHz with a signal-to-noise ratio of ∼68.1 and ∼71.8 dB in a mode-locked scheme based on the NPE effect and based on the hybrid mechanism, respectively. It is worth noting that the resulting signal-to-noise ratio is quite high for such systems. , …”