Supercontinuum generation and carrier envelope offset frequency measurement in a tapered single-mode fiber

Abstract

We report supercontinuum generation by launching femtosecond Yb-fiber laser pulses into a tapered single-mode fiber of 3-lm core diameter. A spectrum of more than one octave, from 550 to 1,400 nm, has been obtained with an output power of 1.3 W at a repetition rate of 250 MHz, corresponding to a coupling efficiency of up to 60 %. Using a typical f-2f interferometer, the carrier envelope offset frequency was measured and found to have a signal-to-noise ratio of nearly 30 dB.

Frequency-stabilized Yb:fiber comb with a tapered single-mode fiber

“…An SC spectrum ranging from 500 nm to 1500 nm is obtained, similar to our results in Ref. [18]. Based on the SC spectrum, the optimized SNR of the CEO signal reaches 44 dB and the linewidth decreases to nearly 110 kHz.…”

“…Last year, we generated a supercontinuum (SC) and measured the CEO signal in an Yb: fiber laser by using a section of TSMF with a diameter of 3 µmm and a tapered length of 9 cm. [18] A spectrum ranging from 500 nm to 1500 nm and a CEO signal with a signal-to-noise ratio (SNR) of nearly 30 dB were obtained. But in that case, the commercial Yb:fiber oscillator (Menlosystems GmbH) that we used was unable to adjust the dispersion in the cavity, so we had no opportunity to optimize the characteristics of the CEO signal, including the SNR and the linewidth.…”

Synthesis and Direct Sampling of Single-Cycle Light Transients by Electron Tunneling in a Nanodevice

“…Three-Channel, ∼1.1 Octave Bandwidth, Optical Field Synthesizer. The white-light supercontinuum generated on the propagation of carrier-envelope-phase (CEP)stable ultrashort laser pulses (τ ∼ 7 fs, λ ∼ 680 to 1050 nm, energy ∼ 2.5 nJ, and repetition rate ∼ 80 MHz) through a photonic crystal fiber (PCF) 9,40,41 was partitioned into three different spectral channels, as per their different dispersion characteristics. The coherent white-light supercontinuum of ∼1 nJ energy spanning from 500 to 1400 nm was produced on propagation of the laser pulses through a commercially available PCF (FEMTOWHITE 800, NKT).…”

A long-term frequency-stabilized erbium-fiber-laser-based optical frequency comb with an intra-cavity electro-optic modulator

“…[16] In China, a few research groups are developing a fiber-based comb system with an intra-cavity EOM. [21][22][23] In this paper, we present the progress of an erbium-fiberlaser-based optical frequency comb used for strontium optical clock frequency measurement. Its repetition rate ( f r ) is about 209 MHz.…”