Low-loss single-mode hybrid-lattice hollow-core photonic crystal fiber

February 21, 2021

Recent spotlights on IC-HCPCFs are due to the recently demonstrated outstanding ultralow-loss performances and their application capabilities. Nevertheless, while their attenuation achieves impressive figures, the challenge of accomplishing a low loss, single-mode (SM), and polarization-maintaining HCPCF perseveres.

In a new paper published in Light: Science & Applications, a team of scientists, led by Professor Fetah Benabid from the University of Limoges, France, and in collaboration of the University of Modena, Italy and the company GLOphotonics, proposed and fabricated a new IC-HCPCF, the hybrid Kagome-tubular lattice (HKT) HCPCF, which combines effective single-mode operation and ultralow loss. The cladding of the HKT HCPCF exhibits an inner cladding made of six untouching tubes and a Kagome outer cladding, which are linked by thin connecting tubes. The inner cladding guarantees an effective single-mode operation by providing coupling between the LP11-like modes guided in the core (usually the foremost contaminating higher-order modes to the fiber modal content) to the fundamental mode of the cladding tubes. In turn, the Kagome outer cladding significantly reduces the confinement loss.

"We endeavored to fabricate such a fiber and experimentally achieved a minimum transmission loss of 1.6 dB/km at 1050 nm. Moreover, we assessed the fiber modal content and attained a record high-order modes extinction ratio of 47 dB in a 10 m-long fiber," the researchers explain.

"The fiber single-mode operation is remarkably robust. We tested the fiber under motion and inspected the fiber modal content while misaligning the input coupling beam. We observed higher-order modes extinction ratios as high as 24.7 dB even when the coupling beam was severely misaligned (input beam shifted by 10 μm from its optimum position)."

Additionally, Prof. Benabid forecasts that "further improvements on the experimental fiber structure, such as having better control on the shapes and sizes of the connecting tubes between the tubular and Kagome lattices, are expected to entail loss reduction by more than one order of magnitude."

"In the manuscript, we delved into the fiber design rationale and extensively studied the effect of associating two IC claddings in the new HKT HCPCF. Indeed, the IC principles apprise the main design elements which allow attaining ultralow loss and tailoring the fiber properties for specific applications. Additionally, they inform the great freedom in designing HCPCFs and make us confident that, by judicious choice of the cladding structure and by ingenious fabrication methods, this fiber will be elected as protagonist of the next transformative developments in HCPCF technology", says Prof. Benabid.
-end-


Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Related Benabid Articles from Brightsurf:

Low-loss single-mode hybrid-lattice hollow-core photonic crystal fiber
Inhibited-coupling hollow-core photonic-crystal fibers (IC-HCPCF) are proving to be serious candidates for next-generation optical fiber.

The Lancet Neurology: Pioneering study suggests that an exoskeleton for tetraplegia could be feasible
A whole-body exoskeleton, operated by recording and decoding brain signals, has helped a tetraplegic patient to move all four of his paralysed limbs, according to results of a 2-year trial published in The Lancet Neurology journal.

Kansas State University researchers invent, patent new class of lasers
Kansas State University researchers have invented a new class of lasers.

Founder of movement disorders field to receive Parkinson's award
In honor of his immeasurable contributions to the study and treatment of movement disorders such as Parkinson's disease, Van Andel Research Institute (VARI) will present renowned neuroscientist and clinician Stanley Fahn, M.D., with the 2016 Jay Van Andel Award for Outstanding Parkinson's Disease Research.

UT Southwestern geneticist receives Breakthrough Prize
UT Southwestern Medical Center geneticist Dr. Helen H. Hobbs is the 2016 recipient of the prestigious Breakthrough Prize in Life Sciences.

The laser pulse that gets shorter all by itself
A new method of creating ultra short laser pulses has been created: Just by sending a pulse through a cleverly designed fiber, it can be compressed by a factor of 20.

Neurosurgeon shares Lasker-DeBakey Award for pioneering work on Parkinson's disease treatment
French neurosurgeon Alim Louis Benabid and American neurologist Mahlon DeLong were recently named winners of the 2014 Lasker-DeBakey Clinical Medical Research Award for their roles in developing deep brain stimulation for the treatment of Parkinson's disease.

Landmark study analyzes scientific productivity and impact of the top 100 PD investigators
IOS Press is pleased to announce the publication of a landmark study in which both traditional and innovative scientometric approaches have been employed to identify the top 100 Parkinson's disease (PD) investigators since 1985 and measure their scientific productivity as well as the impact of their contributions to the field.

Physicists break color barrier for sending, receiving photons
University of Oregon scientists have invented a method to change the color of single photons in a fiber optic cable.

Supercontinuum generation and soliton dynamics milestone achieved
A research team led by Fetah Benabid, University of Bath, has observed for the first time the simultaneous emission of two resonant dispersive waves by optical solitons, waves that maintain their shape while traveling at constant speeds, according to a new report in Optics Letters.

Read More: Benabid News and Benabid Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.