# US 2014/0153888 A1 · Supercontinuum pulse source with enhanced spectrum

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- Number: US 2014/0153888 A1
- Document ID: US20140153888A1
- Status: Published application
- Kind: A1
- Application number: 13/908,357
- Filed: 2013-06-03
- Published: 2014-06-05
- Earliest claimed: 2008-02-08
- Assignees: Fianium Ltd.
- Inventors: Jonathan Cave Knight; Dmitry Vladimirovich Skryabin; James Morgan Stone
- Web page: https://patentgrep.com/patent/US20140153888A1

## CPC

- H01S 3/06741: {Photonic crystal fibre, i.e. the fibre having a photonic bandgap}
- G02B 6/02: Optical fibres with cladding {with or without a coating}
- G02B 6/02214: {tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened}
- G02B 6/02347: {Longitudinal structures arranged to form a regular periodic lattice, e.g. triangular, square, honeycomb unit cell repeated throughout cladding}
- G02F 1/365: in an optical waveguide structure (G02F1/377, {G02F1/395} take precedence)
- H01S 3/08086: {Multiple-wavelength emission}
- H01S 3/094003: {the pumped medium being a fibre}
- G02F 1/3528: {for producing a supercontinuum}
- G02F 2202/32: Photonic crystals
- H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

A source of optical supercontinuum radiation comprises a microstructured optical fibre and a pump laser adapted to generate lasing radiation at a pump wavelength, the microstructured optical fibre comprising a core region and a cladding region which surrounds the core region; the core of the microstructured fibre comprising a first refractive index and the cladding region comprising an effective refractive index such that the Δ-value is greater than 0.03; the fibre comprising a zero dispersion wavelength within ±200 nm of said pump wavelength; wherein the fibre can support a plurality of modes at said pump wavelength; and wherein the pump laser is adapted to launch said lasing radiation at said pump wavelength into said core region of said microstructured optical fibre to excite the fundamental mode of the fibre. In one practice, the source of optical supercontinuum radiation does not include a pump laser arranged to pump said microstructured optical fibre at a wavelength different from said pump wavelength.

## Claims

### Claim 1

A source of optical supercontinuum radiation, the source comprising a microstructured optical fibre and a pump laser adapted to generate lasing radiation at a pump wavelength;
said microstructured optical fibre comprising a core region and a cladding region which surrounds the core region;
said core region of said microstructured fibre comprising a first refractive index and the cladding region comprising an effective refractive index such that the Δ-value is greater than 0.03;
said fibre comprising a zero dispersion wavelength within ±200 nm of said pump wavelength, wherein said fibre can support a plurality of modes at said pump wavelength; and
wherein said pump laser is adapted to launch said lasing radiation at said pump wavelength into said core region of said microstructured optical fibre to excite the fundamental mode of said fibre.

### Claim 2

A source of optical supercontinuum radiation, the source comprising a microstructured optical fibre and a pump laser adapted to generate lasing radiation at a pump wavelength,
said microstructured optical fibre comprising a core region and a cladding region which surrounds the core region;
said fibre comprising a zero dispersion wavelength within ±200 nm of said pump wavelength, wherein said fibre can support a plurality of modes at said pump wavelength;
said pump laser is adapted to launch said lasing radiation at said pump wavelength into said core region of said microstructured optical fibre to excite the fundamental mode of said fibre; and
wherein said source of optical supercontinuum radiation does not include a pump laser arranged to pump said microstructured optical fibre at a wavelength different from said pump wavelength.