Stable narrow spacing dual-wavelength Q-switched graphene oxide embedded in a photonic crystal fiber

Abstract

An ultra-stable dual-wavelength saturable absorber based on a cladding-embedded commercial graphene oxide (GO) solution by capillary action in a solid core photonic crystal fiber (PCF) is demonstrated for the first time. The saturation absorption property is achieved through evanescent coupling between the guided light and the cladding-filled graphene layers. Stable spacing dual-wavelength fiber lasing is attained by controlling the polarization state of a simple 0.9 m long ring of highly doped Leikki Er80-8/125 erbium-doped fiber as the primary gain medium with PCF, polarization controller and tunable bandpass filter. Embedded GO is used to generate the desired pulsed output, and the laser is capable of generating pulses having a repetition rate of 24 kHz with an average output power and pulse energy of 0.167 mW and 8.98 nJ, respectively, at the maximum pump power of 220 mW.

A Stable Dual-wavelength Thulium-doped Fiber Laser at 1.9 μm Using Photonic Crystal Fiber

“…The use of PCF brings advantages of flexibility and wavelength-dependent characteristics, thus making the material an almost ideal choice as a wavelength selective filter for TDFL. This work is synchronous with previous efforts to generate microwave signals from fiber optic elements for use in radio over fiber (ROF) applications, which are mentioned in 16 17 18 for the 1.5 μm region. The particular interest in the development of the 1.9 μm source is in anticipation of spectroscopic analysis applications of various gases, in particular for high sensitivity trace gas sensing of CO 2 , N 2 O, H 2 CO, and HBr 20 .…”

“…A large number of researchers have investigated the distinctive properties of photonic crystal fibers, such as wide range single mode operation, dispersion flexibility, large mode area and its application in multi-wavelength generation 14 15 16 17 . In most cases, those properties were proven to be wavelength dependent and equivalent to the behavior of wavelength-selective filters 18 19 .…”

Manipulating of nanometer spacing dual-wavelength by controlling the apodized grating depth in microring resonators

“…Another configuration of tunable dual-wavelength is demonstrated in [8], wherein a high birefringence FBG stabilizes a dual-wavelength laser produced when the polarization state of each wavelength is altered using a polarization controller. A large number of researchers have investigated the distinctive properties of photonic crystal fibers, such as wide range single mode operation, dispersion flexibility, large mode area and its application in multi-wavelength generation [9][10][11][12]. In most cases, these properties were proven to be wavelength dependent and equivalent to the behavior of wavelength-selective filters [13,14].…”

A passively Q-switched ytterbium-doped fiber laser based on a few-layer Bi2Se3saturable absorber

“…The main advantage of these optical pulses lies in their wide range of applications, such as in high-speed communications, optical imaging and material processing. Pulse lasers are also known for their flexibility and low cost of deployment for various applications [1][2][3][4][5][6]. The passively Q-switched technique has been proven as a very useful method to generate stable and reliable optical pulses from a fiber laser.…”