Laser obstacle ranging and display
First Claim
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1. Fiber laser, for detecting at least one object, comprising:
- at least one signal diode, said at least one signal diode generating at least one beam of light;
a circulator, optically coupled with said at least one signal diode, for directing said at least one beam of light in at least one of at least two different directions;
an erbium doped fiber (EDF), optically coupled with said circulator, for amplifying said at least one beam of light thereby producing at least one amplified one beam of light;
a wavelength division multiplexer (WDM), optically coupled with said EDF;
a delay line, optically coupled with said WDM;
a narrow band reflector, optically coupled with said delay line, for reflecting only said at least one amplified beam of light back through said EDF a second time, thereby producing at least one double amplified beam of light;
a first fiber pump diode, optically coupled with said WDM, for pumping said EDF;
an input combiner, optically coupled with said circulator;
an erbium-ytterbium co-doped fiber (EYDF), optically coupled with said input combiner, for amplifying said at least one double amplified beam of light, thereby producing at least one triple amplified beam of light;
a second fiber pump diode, optically coupled with said input combiner, for pumping said EYDF;
an output combiner, optically coupled with said EYDF; and
a third fiber pump diode, optically coupled with said output combiner, for pumping said EYDF,wherein said WDM and said at least one signal diode are located on opposite sides of said EDF,wherein said output combiner outputs said at least one triple amplified beam of light.
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Abstract
A novel laser obstacle warning and ranging system, for detecting hard-to-see long and thin obstacles in particular, comprises a fiber laser including a signal diode, a circulator, an erbium doped fiber, a wavelength division multiplexer, a narrow band reflector, a first fiber pump diode, an input combiner, an erbium-ytterbium co-doped fiber, a second fiber pump diode, an output combiner and a third fiber pump diode.
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Citations
69 Claims
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1. Fiber laser, for detecting at least one object, comprising:
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at least one signal diode, said at least one signal diode generating at least one beam of light; a circulator, optically coupled with said at least one signal diode, for directing said at least one beam of light in at least one of at least two different directions; an erbium doped fiber (EDF), optically coupled with said circulator, for amplifying said at least one beam of light thereby producing at least one amplified one beam of light; a wavelength division multiplexer (WDM), optically coupled with said EDF; a delay line, optically coupled with said WDM; a narrow band reflector, optically coupled with said delay line, for reflecting only said at least one amplified beam of light back through said EDF a second time, thereby producing at least one double amplified beam of light; a first fiber pump diode, optically coupled with said WDM, for pumping said EDF; an input combiner, optically coupled with said circulator; an erbium-ytterbium co-doped fiber (EYDF), optically coupled with said input combiner, for amplifying said at least one double amplified beam of light, thereby producing at least one triple amplified beam of light; a second fiber pump diode, optically coupled with said input combiner, for pumping said EYDF; an output combiner, optically coupled with said EYDF; and a third fiber pump diode, optically coupled with said output combiner, for pumping said EYDF, wherein said WDM and said at least one signal diode are located on opposite sides of said EDF, wherein said output combiner outputs said at least one triple amplified beam of light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 68)
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64. Fiber laser, for detecting at least one object, comprising:
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at least one signal diode, said at least one signal diode generating at least one beam of light; a preamplifier stage, coupled with said at least one signal diode, for amplifying said at least one beam of light; at least one additional preamplifier stage, coupled with said preamplifier stage, for additionally amplifying said at least one amplified beam of light; and a booster stage, coupled with said at least one additional preamplifier stage, for amplifying said at least one additionally amplified beam of light, said preamplifier stage comprising; a circulator, optically coupled with said at least one signal diode, for directing said at least one beam of light in at least one of at least two different directions; an erbium doped fiber (EDF), optically coupled with said circulator, for amplifying said at least one beam of light thereby producing at least one amplified one beam of light; a wavelength division multiplexer (WDM), optically coupled with said EDF; a delay line, optically coupled with said WDM; a narrow band reflector, optically coupled with said delay line, for reflecting only said at least one amplified beam of light back through said EDF a second time, thereby producing at least one double amplified beam of light; and a first fiber pump diode, optically coupled with said WDM, for pumping said EDF, said booster stage comprising; an input combiner, optically coupled with said at least one additional preamplifier stage; an erbium-ytterbium co-doped fiber (EYDF), optically coupled with said input combiner, for amplifying said at least one double amplified beam of light, thereby producing at least one triple amplified beam of light; a second fiber pump diode, optically coupled with said input combiner, for pumping said EYDF; an output combiner, optically coupled with said EYDF; and a third fiber pump diode, optically coupled with said output combiner, for pumping said EYDF, wherein said WDM and said at least one signal diode are located on opposite sides of said EDF, wherein said output combiner outputs said at least one triple amplified beam of light. - View Dependent Claims (65, 66, 69)
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67. Fiber laser, for detecting at least one object, comprising:
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at least one signal diode, said at least one signal diode generating at least one beam of light; a preamplifier stage, coupled with said at least one signal diode, for amplifying said at least one beam of light; a splitter, coupled with said preamplifier stage, for splitting said at least one amplified beam of light into a plurality of amplified beams of light; and at least one booster stage, each said at least one booster stage being coupled with said splitter, for amplifying respectively each one of said plurality of amplified beams of light, said preamplifier stage comprising; a circulator, optically coupled with said at least one signal diode and with said splitter, for directing said at least one beam of light in at least one of at least two different directions; an erbium doped fiber (EDF), optically coupled with said circulator, for amplifying said at least one beam of light thereby producing at least one amplified one beam of light; a wavelength division multiplexer (WDM), optically coupled with said EDF; a delay line, optically coupled with said WDM; a narrow band reflector, optically coupled with said delay line, for reflecting only said at least one amplified beam of light back through said EDF a second time, thereby producing at least one double amplified beam of light; and a first fiber pump diode, optically coupled with said WDM, for pumping said EDF, each one of said at least one booster stage comprising; an input combiner, optically coupled with said splitter; an erbium-ytterbium co-doped fiber (EYDF), optically coupled with said input combiner, for amplifying said at least one double amplified beam of light, thereby producing at least one triple amplified beam of light; a second fiber pump diode, optically coupled with said input combiner, for pumping said EYDF; an output combiner, optically coupled with said EYDF; and a third fiber pump diode, optically coupled with said output combiner, for pumping said EYDF, wherein said WDM and said at least one signal diode are located on opposite sides of said EDF, wherein each said respective output combiner outputs a respective one of said plurality of amplified beams of light.
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Specification