Versatile multi-wavelength ultrafast fiber laser mode-locked by carbon nanotubes

Abstract

Multi-wavelength lasers have widespread applications (e.g. fiber telecommunications, pump-probe measurements, terahertz generation). Here, we report a nanotube-mode-locked all-fiber ultrafast oscillator emitting three wavelengths at the central wavelengths of about 1540, 1550, and 1560 nm, which are tunable by stretching fiber Bragg gratings. The output pulse duration is around 6 ps with a spectral width of ~0.5 nm, agreeing well with the numerical simulations. The triple-laser system is controlled precisely and insensitive to environmental perturbations with <0.04% amplitude fluctuation. Our method provides a simple, stable, low-cost, multi-wavelength ultrafast-pulsed source for spectroscopy, biomedical research and telecommunications.

Ultrafast all-fibre laser mode-locked by polymer-free carbon nanotube film

“…Carbon nanotubes (CNT) have already demonstrated their ability to be utilised as saturable absorbers for ultra-fast fibre lasers [1][2][3][4][5][6]. They are commonly used in the form of a relatively thin polymer film carrying uniformly distributed CNT [1,7].…”

Optimal design of higher energy dissipative-soliton fiber lasers

“…Fiber lasers have attracted much attention because of their simple design, low cost, high stability and low alignment sensitivity [1][2][3][4][5][6][7][8]. In order to achieve short pulses from a fiber laser, the mode locking technique is usually used.…”

Multiwavelength pulse generation using a SESAM-based mode-locked fiber laser together with Fabry–Perot filter

“…Exploiting nonlinear amplifying loop mirror (NALM), dual-wavelength DSs at 1572 and 1587 nm can be achieved simultaneously, due to the birefringence-induced filtering effect [11]. Meanwhile, multiwavelength passively mode-locked fiber laser can also be realized by virtue of nonlinear polarization rotation (NPR) [12], graphene [13], and carbon nanotubes (CNT) [14,15]. However, all the multiwavelength pulse generation mentioned above are realized by either the birefringence-induced filtering effect or incorporating variable filters in the cavity.…”