Wide-bandwidth chirped fiber bragg gratings with low delay ripple amplitude
Assignee3M Innovative Properties Company
InventorsJames F. Brennan III, Edward Hernandez, John A. Valenti, Pranay G. Sinha, Michael R. Matthews, Dale E. Elder, Gerard A. Beauchesne, Chad H. Byrd
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Abstract
A device including a chirped Bragg grating, said grating having (a) a reflection bandwidth having a full-width at half maximum that is greater than 6 nm, and (b) a reflection delay ripple amplitude of less than ±50 ps.
Claims20
A device, comprising:
- a chirped Bragg grating, said grating having (a) a reflection bandwidth having a full-width at half maximum that is greater than 6 nm, and (b) a reflection delay ripple amplitude of less than ±50 Ps.
A dispersion compensating device, having a dispersion magnitude greater than 100 ps/nm, comprising a circulator and a chirped Bragg grating having a bandwidth greater than 6 nm;
- where the optical signal to noise ratio needed to maintain a bit-error-rate at between 10−9 and 10−10 of a 10 Gbit/s optical fiber communications system, varies less than 3 dB as the wavelength of the transmitting laser is varied at less than 25 pm steps across the full bandwidth of the device.
An optical fiber for propagating light comprising
- a core;
- a cladding;
- and
- a chirped Bragg grating comprising
- refractive index perturbations formed within the waveguide, said grating having a bandwidth in reflection having a full-width at half maximum greater than 6 nm;
- a reflection delay ripple amplitude, determined by subtracting a sixth-order polynomial from the reflection delay curve measured by the modulation-phase shift method with a frequency of 200 MHz, less than ±50 ps;
- a dispersion, measured in reflection, of magnitude greater than 100 ps/nm;
- and
- a peak insertion loss, measured in transmission, greater than 1 dB.
An optical device, comprising:
- a waveguide equipped with a chirped Bragg grating, said grating comprising refractive index perturbations formed within the waveguide and having a bandwidth in reflection having a full-width at half maximum greater than 6 nm;
- and
- a reflection delay ripple amplitude which, when determined by subtracting a sixth-order polynomial from the reflection delay curve measured by the modulation-phase shift method using a frequency of 200 MHz, is less than k;
- wherein |k|<50 ps.
Dependencies are inferred from the claim text.