All-fiber broadband supercontinuum source with high efficiency in a step-index high nonlinear silica fiber

Abstract

We demonstrate an all-fiber broadband supercontinuum (SC) source with high efficiency in a step-index high nonlinear silica fiber, which was pumped by a 1557 nm subpicosecond-pulse laser in the normal dispersion region. The broad SC spectrum covers the spectral range from 840 to 2390 nm, and the 10 dB bandwidth from 1120 nm to 2245 nm of the SC covers one octave, assuming the peaks near 1550 nm were filtered. The SC source system is constructed by all-fiber components, which can be fusion-spliced together directly with low loss, less than 0.1 dB. Thus the SC source has high energy transfer efficiency from the pump source. The maximum SC average power of 332 mW is obtained, including the peaks near 1550 nm. The spectral density for the 10 dB bandwidth is in the range from -17.3 to -7.3 dBm/nm.

Supercontinuum generation from a multiple-ring-holes tellurite microstructured optical fiber pumped by a 2 μm mode-locked picosecond fiber laser

“…In order to obtain a high power and coherent light in a relatively wide wavelength range, especially in the near infrared, which covered most of the commercially available pump laser sources, we developed an all-fiber broadband SC source with high efficiency in a step-index highly nonlinear silica fiber with a 10 dB bandwidth that covered one octave from 1120 to 2245 nm [16]. The SC source we developed and another SC source (Fianium SC450, 450-1800 nm) were used to measure the chromatic dispersion from the visible to mid-IR.…”

Experimental study of supercontinuum generation in step-index highly nonlinear fibers

“…The nonlinear parameters of silica HNLFs are significantly larger than that of SSMF due to their small effective area [21][22][23][24]. In addition, silica HNLFs can be fusion spliced to SSMF directly, which provides the possibility for the SC source with all-fiber structure [25][26][27][28].…”

Compact all-fiber source of coherent linearly polarized octave-spanning supercontinuum based on normal dispersion silica fiber

“…As a result, by connecting the fiber laser with the nonlinear fiber one can develop a compact all-fiber supercontinuum source, without using any bulk optics and optomechanics, and without the necessity of any alignment. This idea was already applied for a subpicosecond laser operating at 1.56 μm and a step-index silica fiber with zero dispersion wavelength at 1.59 μm 15 which resulted in generation of a very broad supercontinuum covering the 1.12–2.24 μm spectral range. Likewise, an all-fiber system generating a 0.7–1.7 μm supercontinuum was developed by splicing a microstructured silica fiber with a 1.064 μm picosecond pump 16 .…”