Laboratory of Special Optical Fibers

Shvabe Holding

RTIOM “S.I.Vavilov State Optical Institute”, JC

Laboratory of Special Optical Fibers

Saint-Petersburg, Russia

Jan.,2017

RTIOM S.I.Vavilov State Optical Institute, JC Saint-Petersburg, Russia

Technical support: +7-812-676-5461 http://fiber-lab.ru [email protected]

Laboratory Overview

Located in Saint-Petersburg, Russia and established in 1982 our laboratory - the leading manufacturer

of special optical quartz fibers and fiber-optic products in Russia. The laboratory is one of advanced

research-and-production divisions of Research and Technological Institute of Optical Materials all-Russia

Scientific Center "S.I.Vavilov State Optical Institute".

The fibers and fiber-optic products are used in research and industrial applications in the areas of

spectroscopy, analytical chemistry, sensing applications, medical sub-components, various space

applications, and a wide range of military applications.

The large scientifical experience with flexibility of technological processes allow our laboratory to develop

and manufacture various fiber-optical products having the high-level characteristics.

Now we develop and produce the next fiber optical products:

Single- and multimode fibers

Fibers with silicone, acrylate and metallic coatings

UV broadband multimode fibers

Laser radiation transmitting fibers

Polarisation maintaining singlemode fibers

High-strength fibers

Photonic crystal fibers and microstructured lightguides

Mono- and polycapillaries with various coatings

Fiber-optical cables and

Fiber-optical bundles for light radiation transmitting

According to your wishes we can:

• To design optical fibers or fiber-optic products with the set characteristics and technological

process for manufacturing of the fiber

• To develop a manufacturing process of fiber from your material

• To produce a fiber meeting to your requirements, including rod-preform formation, drawing of

fiber with various diameters and lengths, and also manufacturing of fiber-optical bundles

• To test optical fibers for optical, geometrical and mechanical characteristics.

mailto:[email protected]



Polarization-Maintaining, Single Mode Optical Fiber

PM fibers are singlemode fibers, developed to maintain the polarization

properties of linearly polarized light sources. The light is launched along either

the slow or fast axes of the fiber through applying of stressing cladding that

creates birefringence in the fiber's core.

PM40 are bend- and temperature-insensitive PM fibers. They are commonly

used in fiber optic gyroscopes (FOG) applications. These fibers are designed for

applying at small bend diameters and over a wide temperature range.

PM125-1550-PR are photosensitive fibers and can be exposed to UV light to

change their refractive index. This property allows to use photosensitive fibers

in creation of Fiber Bragg Gratings.

PM80- and PM125-1550 are designed for use at1550 nm, these fibers are used in all PM applications for data and

telecom.

Typical applications

FOGs Fiber Bragg gratings Laser pigtailing Small form factor couplers Specialty sensors

PM40-810 PM40-1310 РМ80-1550 PM125-1550 PM125-1550-PS

Wavelength Range

(nm) 800-1100 1200-1500 1300-1650 1300-1650 1500-1650

Cut-off Wavelength

(nm) 700-780 1150-1280 1300-1480 1200-1500 1400-1500

Attenuation (dB/km) <8 @810 nm <6@1310 nm <2 @1550 nm <2 @1550 nm <4 @1550 nm

h-parameter (m-1) <5·10-4 <5·10-4 < 2·10-5 < 2·10-5 < 2·10-5

Beat Length (mm) <1.8 <2.5 <3 <3 <3

Mode Field Diameter

(μm) 2.8±0.2 2.8±0.2 6±0.5 8±0.8 6±0.8

Cladding Diameter

(μm) 40±1 40±1 80±1 125±2 125±2

1st Coating Diameter

(μm) 115±5 115±5 115±2 190±5 245±10

2nd Coating Diameter

(μm) n/a n/a 170±5 245±10 n/a

Coating Material UV-cured Acrylate

Minimum Bend

Radius (mm) 2 2 4 12 12

Proof-Test (%) 1

Operating

Temperature (С) -45 - +80

Our PM fibers can be designed for wide wavelength range within visible and infrared spectrum.




Bend Insensitive, Radiation Hardened Single-Mode Fibers

These pure silica core fibers are single-mode fibers designed to be

resistant to temperature, bend and ionizing radiation.

The fiber is available in both 125 and 80 μm clad diameters.

It is ideally suited for special sensor applications or applications

requiring small radius bend.


Laser pigtailing Specialty sensors Avionics

RH80 RH125

Wavelength Range (nm) 1520-1630

Cut-off Wavelength (nm) 1450±70

Attenuation (dB/km) ≤1 @1550 nm

Mode Field Diameter (μm) 7.5±1 7.0±1

NA 0.16

Core Diameter (μm) 7.6 7.8

Cladding Diameter (μm) 80±1 125±2

1st Coating Diameter (μm) 115±2 190±5

2nd Coating Diameter (μm) 170±5 245±10


Minimum Bend Radius (mm) 8 12

Proof-Test (%) 1

Operating Temperature (С) -55 - +125




0.12 NA Multimode, Graded-Index Core, UV and Visible

Transparent, Low Dispersion Fiber

These fibers have a fiber core with a refractive index that varies from the center to the edge. The graded-

index fibers provides a significant decrease in modal dispersion when compared to step-index fibers.

Utilizing a graded-index design, these 0.12 NA multimode fiber demonstrate high bandwidth UV optical

pulses over long distances without pulse distortion and significant attenuation.

Typical Applications

Transportation of subnanosecond UV laser diagnostic signals

Fluorometric analysis of microscopic objects Medicine (UV-spectra therapy)

The 62.5/125 fiber can be handled just like standard telecommunication fiber.

LD125 LD135 LD340 LD590

Wavelength Range(nm) 300-800

NA 0.12

Attenuation (dB/km) <190 @351 nm

<20 @527 nm

Pulse Dispersion (psec/m) ≤1.0 @351 nm

≤0.5 @527 nm

Bandwidth (MHz∙km) ≥440 @351 nm

≥880 @527 nm

Fiber Construction Core/Silica Cladding/Coating

Core Diameter (µm) 62.5±2 100±2 250±5 435±7

Cladding Diameter (µm) 125±2 135±2 340±5 590±10

Coating Diameter (µm) 210±8 230±8 450±10 750±15


Minimal Bend Radius (mm) 35 40 100 180

Proof-Test, % 0.5

Operating Temperature (С) -45 - +80

0

50

100

150

200

250

300

300 400 500 600

Att

en

ua

tio

n (d

B/k

m)

Wavelength (nm)

Fiber Attenuation Curve




0.22 NA Silica Core, Glass Cladding Multimode Fiber,

Step Index

The step index fiber is designed with a

constant index of the refraction in the

core glass. Typically, the fiber core is

fused silica, while the fiber cladding is

fused silica doped with F.

There are fibers with the low hydroxyl-

ion content (Low –OH) for VIS-NIR range

of spectrum and with the high hydroxyl-

ion content (High –OH) for UV-VIS range

of spectrum.

These fibers can be coated by polymer or metalized. A germetic tin or plumbum coating, unlike

polymeric, is roentgenocontrast. Germetic coating admits sterilisation and provides an invariance of

optical and mechanical characteristics of the fiber at long influence of humidity, рН, temperature.

The fibers are available in a variety of a core diameter of 100 µm-1000 µm.

Large-core fibers are also well suited for high power applications as the power is transmitted through

a large cross section of a fiber core.


Medical lasers Spectroscopy Light transmission Laser power transmission

QF200 QF400 QF600 QF800 QF1000

Wavelength Range (nm) 250-1200 High -OH

400-2000 Low -OH

NA 0.22

Fiber Construction Silica Core/ F-doped Silica Cladding/Coating

Core Diameter (µm)a 200±5 400±7 600±10 800±12 1000±15

Cladding Diameter (µm)b 220±5 440±7 660±10 880±12 1100±15

Coating Diameter (µm) acrylate

tin

250-500

265±10

500-750

485±10

720-950

705±10

1050±10

925±10

1300±10

1145±10

Coating Material UV-cured Acrylate, tin

Minimal Bend Radius (mm) 13 26 39 52 65

Proof-Test (%) 1

Operating Temperature (С) -45 - +80 (acrylate) -50-+200 (tin) -60-+300 (plumbum) a-some diameters presented b-clad/core ratio is equal 1.1

The fibers are available in any integer length, starting from 1 m




0.36 NA Silicone Clad Multimode Optical Fiber, Step Index

The fibers feature a silica core and a light-reflecting silicone cladding. The cladding enables a higher NA

than a silica cladding and reduces cost.

Silicone light-reflecting cladding enables a NA of 0.36.

These fibers are available with Acrylate coatings.


Spectroscopy Medical diagnostics Laser radiation transfer Sensors

There are fibers with the low hydroxyl-ion content (Low –OH) for VIS-NIR range of spectrum and with

the high hydroxyl-ion content (High –OH) for UV-VIS range of spectrum.

QS100 QS200 QPS00


NA 0.36

Fiber Construction Silica Core/Silicone Cladding/ Coating

Core Diameter (μm)a 100±2 200±5 400±7

Polymer Cladding Diameter (μm) 125±2 150±4 225±4 250±4 480±6

Coating Diameter (μm) 160-215 240-245 260-395 405-515 590-665

Cladding Material Silicone compound (n=1.413 @632.5 nm; NA=0.36)


Minimum Bend Radius (mm) 13 26 52

Proof-Test (%) 1

Operating Temperature(С) -45 - +80 a- some diameters presented

1

10

100

1000

200 600 1000 1400 1800Att

en

uati

on

(d

B/k

m)

Wavelength (nm)

0.36 NA Multimode Fiber Attenuation Curve

99.9%

99%

90%

Tran

smis

sio

n/

m

low -OH

high -OH




0.5 NA Hard Polymer Clad Multimode Optical Fiber,

Step Index These fibers feature a silica core and a light-reflecting hard polymer cladding. The polymer cladding

enables a higher NA than a silicone cladding.

Applying of hard polymer cladding increases NA up to 0.5. Hard Clad fibers are the ideal choice for

disposable medical products.

These fibers are available with Acrylate coatings


Spectroscopy Medical diagnostics Laser radiation transfer Sensors

There are fibers with the low hydroxyl-ion content (Low –OH) for VIS-NIR range of spectrum and with

the high hydroxyl-ion content (High –OH) for UV-VIS range of spectrum.

QP100 QP200 QP400


NA 0.5

Fiber Construction Silica Core/Hard Polymer Cladding/ Coating

Core Diameter (μm)a 100±2 200±5 400±7

Polymer Cladding Diameter (μm) 125±2 150±4 225±4 250±4 480±6

Coating Diameter (μm) 160-215 240-245 260-395 405-515 590-665

Cladding Material Hard Polymer (n=1.37 @632.5 nm; NA=0.5)


Minimum Bend Radius (mm) 13 26 52

Proof-Test (%) 1

Operating Temperature(С) -45 - +150 a- some diameters presented

1

10

100

1000

200 600 1000 1400 1800

Att

en

uati

on

(d

B/k

m)

Wavelength (nm)

0.50 NA Multimode Fiber Attenuation Curve

99.9%

99%

90%

Tran

smis

sio

n/m

high -OH

low -OH




Large Mode Area Photonic Crystal Fibers

endlessly single-mode operation (no higher-order mode cut-off)

handles very high average power as well as high peak power

low nonlinearities

relatively low fiber loss

mode field diameter is wavelength independent

radiation hard

available with core diameters from 10 to 35 microns


High-power delivery with excellent beam quality Mode filtering

Multi-wavelength transmission Short pulse delivery

Low beam divergence pointing

Single-mode large mode area photonic crystal fibers combine a

large effective mode field area and relatively low loss to allow high

average/peak power delivery without nonlinear effects or material

damage over long distances.

The fibers are endlessly single-mode (i.e. have no higher-order

mode cut-off) and provide excellent beam quality at all

wavelengths.




Spectral operation range is only limited by the bend-induced leakage of the fundamental mode at

shorter wavelengths which depends on the fiber core diameter.

a -Bend radius 15.8 cm

b- Available high temperature (200 °C) resistant tin coating

Physical Characteristics Core Diameter (μm)

10 15 20 25 30 35

Cladding Diameter [μm] 80±5 120±5 160±5 200±5 240±10 280±10

Coating Diameter [μm] 110-140 160-190 200-230 250-300 300-350 400-450

Core and Cladding Material Pure silica with OH content less than 1ppm

Coating Material, Single Layer Acrylate b

Proof-Test Level, % 0,5 %

Optical Characteristics Core Diameter (μm)

10 15 20 25 30 35

Higher-Order Mode Cut-Off (nm) no no no no no no

Attenuation @ 1064 nm (dB/km) < 5 < 8 < 10 < 20 not operable not operable

Attenuation @ 1550 nm (dB/km) < 2 < 3 < 5 < 5 < 10 < 10

Mode Field Diameter @ 1550 nm

(1/e2) (μm) 8.0±0.5 12.0±0.5 16.0±0.5 20.0±0.5 23.5±0.5 26.5±0.5

Calculated Numerical Aperture @

1550 nm (1/e2) 0.123 0.082 0.062 0.049 0.042 0.037

Short Wavelength Edge (nm)a 500 600 800 900 1100 1200

Long Wavelength Edge (nm) a 1700 1700 1700 1700 1700 1700




High Power Multimode Fiber Optic Cable

• Air-Gap-Ferrule Technology

• Low-OH Fiber with 0.22 NA

• Operating Wavelength Range: 400 to 2000 nm

• SMA 905 Style Connectors

• Working Field up to 1.0 mm diameter

• 3.0 mm Outer Diameter PVC or PEEK Protective Tubing

• Polished End Face

• Maximum Power Density: 150 kW/cm2 @ 780 nm

• Operating Temperature: -50 °C to 130 °C

• Length up to 50 meters

We can manufacture these cables in custom lengths.

Please contact our Technical Support.

Ferrule

Polished End

Air Gap




Our Facilities

Manufacturing of specialty optical fibers requires a modern technological equipment and highly qualified

staff. These components are the basis of successful scientific and industrial activity that allows to carry

out a productive full-cycle functioning and implement innovative optical fiber items.

The team of specialists in the laboratory is divided into three groups: optical fiber preform fabrication

group, optical fiber drawing group and metrological control group.

The main objective of the first mentioned group is development of technologies and synthesis by the

MCVD method (Modified Chemical Vapor Deposition) of single-mode and multimode optical fiber

preforms. For this purpose, two completely automated technological complexes supplied by Special Gas

Controls are set in the laboratory. Each complex includes thermo-mechanical lathe for the high-

temperature heating of a substrate silica tube by the gas burner, thermo-chemical unit for the gas-vapor

mixture formation and feeding it into thermo-mechanical lathe, vessel for the chemical etching of raw

materials, scrubber for absorbing products of the technological process and neutralization of harmful

gaseous substances.

In addition, the laboratory is equipped by the system of external gas-phase deposition of silica glass

layers doped by various elements on a pure silica basis.

The group is managed by the leading researcher, D.Sci., Honored Inventor of the Russian Federation,

Mikhail Eron'yan.




At the disposal of the optical fiber drawing group are two automated vertically-oriented complexes

(drawing towers) supplied by Optec for producing specialty fibers in different protective coatings.

Each tower is equipped by the preform feeding and positioning unit, high-temperature furnace for

preform heating, a few units for the protective coating application, a few furnaces for the UV-curing of

coating, a few laser sensors for the coating concentricity control, fiber tension sensor, drawing system,

fiber winding mechanism.




Functionality of the equipment allows the group staff not only to produce high-quality optical fibers, but

also to solve successfully scientific and technical tasks oriented on development of novel optical fiber

items, particularly, photonic crystal and microstructured fibers of various geometry and cable production

based on the drawn elements.

At different stages of optical fiber and cables production the clean room of ISO8 class (no more than

100,000 particles of 5 μm in size per 1 m3) is used.

The group is headed by PhD Egishe Ter-Nersesyants.

Control over optical and mechanical characteristics of drawn fibers is provided by the metrological

control group. At the disposal of the group are modern means for measuring a set of key parameters,

such as preform and fiber refractive index profiles, transmission and dispersion, polarization-

maintaining and polarizing properties, modal content and optical field distribution over the fiber cross-

section.

Metrological facilities of the laboratory allows to carry out studying of climate impact on optical fiber

characteristics in the range -50.. +100 ºC, as well as testing optical fiber and cables while transferring

high-power laser radiation.

Preliminary preform and optical fiber parameters calculation, measurement of characteristics and

experimental testing of fabricated items are a necessary link between production and scientific

processes.

The group is headed by researcher Alexander Komarov.

All production activities are held in a tight contact with scientific leader of the laboratory researcher

Vladimir Demidov.




Shvabe Holding

RTIOM S.I.Vavilov State Optical Institute, JC

Laboratory of Special Optical Fibers

36/1, Babushkina st, Saint-Petersburg, 192171 Russia

Phone:+7(812)-676-5641

http://fiber-lab.ru


Documents

Laboratory of Special Optical Fibers