Article

Mid-infrared ZBLAN fiber supercontinuum source using picosecond diode-pumping at 2 μm

Optics Express (Impact Factor: 3.49). 10/2013; 21(20):24281-24287. DOI: 10.1364/OE.21.024281
Source: PubMed

ABSTRACT

We present the first demonstration of mid-IR supercontinuum generation directly pumped with picosecond pulses from a Thulium fiber-amplified gain-switched laser diode at 2 µm. We achieve more than two octaves of bandwidth from 750 - 4000 nm in step-index ZBLAN fiber with Watt-level average power and spectral flatness of less than 1.5 dB over a 1300 nm range in the mid-IR from 2450 - 3750 nm. The system offers high stability, power-scaling capability to the 10 W regime, and demonstrates an attractive route towards relatively inexpensive, versatile and practical sources of high power broadband mid-IR radiation.

Download full-text

Full-text

Available from: Shaif-ul Alam, Sep 04, 2014
  • Source
    • "The dispersive properties plays significant role in determining the quality of the SC spectra [11] [14]. Till date, different nonlinear media have been used to generate SC [15] [16]. For example, SC has been generated in chip-based systems including silicon photonic nanowires [17] [18], chalcogenide waveguides [19], silicon nitride waveguides [20] and silica waveguide [21]. "
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents broadband supercontinuum generation in photonic crystal fibers employing cosh-Gaussian pulses. The supercontinuum spectrum of cosh-Gaussian pulses consists of a large number of internal oscillations which increases with the increase in the value of cosh factor. Unlike the supercontinuum spectra created by Gaussian pulses, which consists of two distinct minima, the spectra created by cosh-Gaussian pulses of equal peak power and pulse duration characterized by virtually flat and broadband supercontinuum. Improvement in the flatness of the generated supercontinuum increases with the increase in the value of cosh factor.
    Full-text · Article · Nov 2015 · Optik - International Journal for Light and Electron Optics
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Hollow-core-photonic-bandgap fiber, fabricated from high-purity synthetic silica, with a wide operating bandwidth between 3.1 and 3.7 μm, is reported. A minimum attenuation of 0.13 dB/m is achieved through a 19-cell core design with a thin core wall surround. The loss is reduced further to 0.05 dB/m following a purging process to remove hydrogen chloride gas from the fiber-representing more than an order of magnitude loss reduction as compared to previously reported bandgap-guiding fibers operating in the mid-infrared. The fiber also offers a low bend sensitivity of <0.25 dB per 5 cm diameter turn over a 300 nm bandwidth. Simulations are in good agreement with the achieved losses and indicate that a further loss reduction of more than a factor of 2 should be possible by enlarging the core using a 37-cell design.
    Full-text · Article · Jan 2014 · Optics Letters
  • [Show abstract] [Hide abstract]
    ABSTRACT: High power supercontinuum generation in fluoride step-index optical fibers pumped with 2-mu m pulses delivered by a gain-switched thulium-doped fiber laser and amplifier system is reported. An output average power of 1.25 W in the similar to 1.8-4.15 mu m spectral band and 1.82 W in the similar to 1.8-3.65 mu m band was achieved for two fluorozirconate fibers of different parameters. The first demonstration of Watt-level supercontinuum generation in a fluoroindate fiber is also demonstrated. The achieved output SC powers are the highest ones ever reported for fluoride fibers pumped with 2-mu m gain-switched optical pulses.
    No preview · Article · Jan 2014 · IEEE Photonics Technology Letters
Show more