C-band high nonlinear optical fiber dispersion 0.0±1ps/(nm.km)

Nonlinear effects in optical fibers, such as stimulated Raman scattering (SRS), stimulated Brillouin scattering (SBS), and the optical Kerr effect, have many applications in the fields of communications and optical signal processing. In the Kerr effect, the refractive index of the light-guiding medium changes with the optical power, which will lead to a series of secondary effects, such as self-phase modulation (SPM), cross-phase modulation (XPM), four-wave mixing (FWM), and non-steady-state modulation. Applications that utilize the Kerr effect include optical parametric amplification, frequency conversion, phase coupling, pulse compression and generation, and optical soliton transmission. The design of highly nonlinear optical fibers needs to consider the following aspects: first, the optical fiber must have high nonlinearity to obtain effective nonlinear interactions; second, the optical fiber must have low loss to increase the effective action length Leﬀ. Third, for various applications, the optical fiber must have matching dispersion characteristics. Finally, the nonlinear optical fiber must have low polarization mode dispersion (PMD). For silica-based highly nonlinear optical fibers, the design of the refractive index profile plays an important role in meeting the above requirements. In the design of high nonlinear optical fiber, a small core effective area Aeﬀ, a low dispersion slope and a cutoff wavelength much smaller than the working wavelength must be achieved at the same time. High nonlinear optical fiber not only has high nonlinearity, but also has a very low dispersion slope. A flexible W-shaped profile design is adopted to introduce a low refractive index inner cladding around the step refractive index core.

Product features：Higher nonlinear coefficient、 Zero dispersion wavelength is adjustable in three bands: S, C, and L、 Lower loss and low dispersion slope、 Small additional loss when spliced with ordinary single-mode fiber

Application area：Parametric amplification、 Wavelength conversion、 Pulse compression、 Supercontinuum source、 Optical regenerator、 Discrete (or lumped) Raman amplifier

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Part Number

NL-1550-ZERO

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General Parameters

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Dimensional Drawing

Photoelectric parameters:

Fiber Type	NL-1550-POS	NL-1550-ZERO	NL-1550-NEG
Optical properties
Operating band	C-band	C-band	C-band
Dispersion slope @1550nm (ps/nm2/km)	<0.035	<0.030	<0.030
Dispersion @1550nm (ps/nm/km)	3±2.0	0.0±1	-5.0±2.0
Non-linear coefficient @1550nm (W-1km-1)	≥10	≥10	≥10
Attenuation coefficient @1550nm (dB/km)	≤1.5	≤1.5	≤1.5
Cut-off wavelength (nm)	<1480	<1480	<1480
Numerical aperture (typical value)	0.35	0.35	0.35
Geometric properties
Glass cladding diameter (μm)	125±7	125±7	125±7
Cladding non-circularity (%)	≤1	≤1	≤1
Core cladding concentricity (μm)	≤0.5	≤0.5	≤0.5
Coating diameter (μm)	245±10	245±10	245±10

Note:

* Provides support for fiber splicing.

* The fluctuation range of the glass cladding diameter of a specific optical fiber is no more than 2um.

Characteristics	Conditions	Data	Unit
Geometric properties
Core diameter	--	62.5±2.5	[μm]
Core non-circularity	--	≤5.0	[%]
Cladding diameter	--	125.0±1.0	[μm]
Cladding non-circularity	--	≤1.0	[%]
Coating diameter	--	245±7	[μm]
Coating/cladding concentricity	--	≤10.0	[μm]
Coating non-circularity	--	≤6.0	[%]
Core/cladding concentricity	--	≤1.5	[μm]
Fiber length	--	Longest to17.6	[km/coil]
Optical properties
Attenuation	850nm	≤2.7	[dB/km]
Attenuation	1300nm	≤0.6	[dB/km]
Full injection bandwidth	850nm	≥200	[MHz·km]
Full injection bandwidth	1300nm	≥500	[MHz·km]
Numerical aperture	--	0.275±0.015	--
Group refractive index	850nm	1.496	--
Group refractive index	1300nm	1.491	--
Zero dispersion wavelength	--	1320~1365	[nm]
Zero dispersion slope	1320nm≤ λ0 ≤1348nm	≤0.11	[ps/(nm2·km）]
Zero dispersion slope	1348nm≤ λ0 ≤1365nm	≤0.001（1458-λ0 ）	[ps/(nm2·km）]
Macrobending loss	--	--	--
100 turns, radius 37.5mm	850nm	≤0.50	[dB]
100 turns, radius 37.5mm	1300nm	≤0.50	[dB]
Backscattering characteristics 1300nm
Steps (average of bidirectional measurements)	--	≤0.10	[dB]
Irregularities and point discontinuities in the length direction	--	≤0.10	[dB]
Attenuation non-uniformity	--	≤0.10	[dB/km]
Environmental Characteristics 850nm and 1300nm
Temperature cycle additional attenuation	-60℃ to 85℃	≤0.10	[dB/km]
Temperature-humidity cycle additional attenuation	-10℃ to 85℃,4% to 98% relative humidity	≤0.10	[dB/km]
Water immersion additional attenuation	23℃, 30 days	≤0.10	[dB/km]
Dry heat additional attenuation	85℃, 30days	≤0.10	[dB/km]
Additional damp heat attenuation	85℃ and 85%Relative humidity，30days	≤0.10	[dB/km]

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