The mode-locked threshold power of the laser is 150 mW and the output power is 26 mW with a pump power of 220 mW. The center wavelength of the mode-locked pulse is 1 046 nm with 3 dB bandwidth of 6.01 nm,20 dB bandwidth of 16nm,pulsewidth of 22 ps and repetition rate of 20 MHz.
The fiber laser can generate 2.05mW average power of 234.375ps pulse duration at a repetition rate of 3.842MHz when the operating center wavelength is 1053nm and spectrum width is about 6nm.
The fiber laser can generate 2.05 mW average power of 234 ps pulse duration at a repetition rate of 3.842 MHz,and operating center wavelength is 1053 nm,spectrum width is about 6 nm.
The central wavelength of output laser moves from 1084.9nm to 1096.3nm,and the output laser power decreases from 0.95W to 0.58W when temperature varies from 13℃ to 95℃.
A double-slit visible-light radiometer is used with the central wavelength located in the band of green light(517.8nm and 519.8nm) and the half-width is 6.6nm.
Using a triple-layer antireflection coating on facets of InGaAsP semiconductor laser chips,the minimum facet reflectivity <0.03% for the center-wavelength of 1310nm and the super-luminescent diode of ASE ripple<0.5dB are obtained.
Using a triple-layer antireflection coating on facets of InGaAsP semiconductor laser chips,the minimum facet reflectivity <0.03% for the center-wavelength of 1310nm and the super-luminescent diode of ASE ripple<0.5dB are obtained.
Using a triple-layer antireflection coating on facets of InGaAsP semiconductor laser chips, the minimum facet reflectivity <10~-4 at the center-wavelength of 1 310 nm and the semiconductor optical amplifiers with ASE ripple <0.5 dB are obtained.
A design example is given for the center-wavelength of 850nm by choosing TiO2 and SiO2,and the result shows that effective refractive index must be considered while designing in order to achieve good performance.
In this paper,it is introduced that a kind of omnidirectional reflector in special spectrum band can be designed by λ/4 film system. Formulas of the center-wavelength and the edge-wavelength of the reflection band are given. It is also analysed quantitativly that how the Brewster angle can be avoided in multiplayer designs.
By adjusting the cavity which was typically plane-concaved structure carefully,the laser was obtained at 1005 nm centre wavelength and the output power was 40 mW. The optical-optical efficiency was 2.7%.
A six layer planar waveguide model has been proposed to analyse the ion beam etched fiber grating filter After optimizing the parameters,in our experiment,we have obtained a narrow band high reflectivity Bragg fiber filter with 1530 6nm centre wavelength,99% reflectivity and 0 3nm bandwidth
With theaid of these formulas,accurate numerical calculation for single dipole andcoupled dipole of 1/6 centre wavelength,and whereby the correspon-ding theoretical curves are given.
For a center wavelength of FBG of about 1550 nm and a 40 nm shift range of its reflection wavelength, the relative error of measurement is only ± 0.001.
The wavelength of the light source is modulated at a frequency of 10?kHz, and the center wavelength is stabilized at the center of the 2ν3 band R(3) line of methane (1.65372?μm).
Variations in the intensity of the solar radiation are measured in the six spectral intervals of the multi-channel photometer: 350, 500, 650, 850, 1100, and 1500 nm, with the bandwidths being about 10% of the central wavelength of each interval.
The RATAN-600 Zenith Field (RZF) catalog was obtained at the central wavelength of 7.6 cm, and contains 437 radio sources, virtually all of which have been identified with NVSS objects.
This effect reduces unwanted variations in the central wavelength, as well as fluctuations of the delay time of the frequency-shifted soliton with respect to the input pulse.
By slightly tuning the central wavelength of the narrowband FBG, SLM lasing at 1549.658 or 1549.563 nm (corresponding to the two transmission peaks of the FBG-FPF) is achieved with a laser output power of ～4 mW, when the pump power is ～75 mW.
The repetition rate of the laser oscillator is 173 MHz at the centre wavelength of 791 nm, and the ultrabroaden spectrum covers from 600 nm to 1000 nm.
At the optimum length of 7?m (αeffL=2.9, where αeff is the effective absorption coefficient of the fibre and L is the fibre length), the fibre laser output was measured to have a centre wavelength of 2105?nm and a line width of ～20?nm.
Theoretical calculations show that, by inserting an intermediate dielectric layer with suitable thickness and shape between the fibres, the centre wavelength can be shifted easily over a range of ±30 nm.
中心波长
center wavelength
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