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| 6954304 | Raman amplifier |
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| 6891661 | Optical amplifier with pump light source control for Raman amplif... |
| 6891776 | Vibrator sweep shaping method |
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| 6868038 | Seismic method of performing the time picking step |
| 6865016 | Controller which controls a variable optical attenuator to contro... |
| 6856642 | Laser resonator with direction sensitive decoupling |
| 6853604 | Solid marine seismic cable |
| 6847585 | Method for acoustic signal transmission in a drill string |
| 6833946 | Optical amplification using polarization diversity pumping |
| 6829082 | Erbium doped crystal amplifier |
| 6825974 | Linearly polarized fiber amplifier |
| 6825973 | Reducing leading edge transients using co-propagating pumps |
| 6820716 | Acoustic isolator for well logging system |
| 6822786 | All fiber gain flattening optical filter |
| 6819478 | Fiber optic transmission system with low cost transmitter compens... |
| 6819481 | Bidirectional wave division multiplex systems |
| 6819628 | Wave migration by a krylov space expansion of the square root exp... |
| 6819849 | Intrusion detection system for secure fiber optics |
| 6816435 | Method for estimating the position of a drill |
| 6813066 | Gain control in nonlinear fiber amplifier stages |
| 6811291 | Detector for signals with harmonically related components |
| 6813068 | Semiconductor optical amplifier and semiconductor laser |
| 6809857 | Optical preamplifier with one amplification unit |
| 6806999 | Raman amplification pumping module, Raman amplifier, and optical ... |
| 6807001 | Auto shutdown for distributed raman amplifiers on optical communi... |
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| 6804045 | Optical chirped beam amplification and propagation |
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| 6801349 | Implementation method of an all-optical half adder by using SOA-b... |
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