CA2690852A1 - Optical waveform shaping device - Google Patents
Optical waveform shaping device Download PDFInfo
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- CA2690852A1 CA2690852A1 CA2690852A CA2690852A CA2690852A1 CA 2690852 A1 CA2690852 A1 CA 2690852A1 CA 2690852 A CA2690852 A CA 2690852A CA 2690852 A CA2690852 A CA 2690852A CA 2690852 A1 CA2690852 A1 CA 2690852A1
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- light beams
- modulation part
- liquid crystal
- waveform shaping
- shaping device
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- Liquid Crystal (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
It is an object of the present invention to provide an optical waveform shaping device of high resolution.
The above-mentioned problem is solved by an optical waveform shaping device (10) comprising a branching filter (1) for branching the light beam from a light source into light beams of each frequency, a condensing part (2) for condensing a plurality of light beams branched by the branching filter (1), a polarizing plate (3) for adjusting the polarization planes of the light beams having passed through the condensing part (2), and a spatial light modulator (4) having a phase modulation part and an intensity modulation part where the light beams having passed through the polarizing plate (3) are incident.
The above-mentioned problem is solved by an optical waveform shaping device (10) comprising a branching filter (1) for branching the light beam from a light source into light beams of each frequency, a condensing part (2) for condensing a plurality of light beams branched by the branching filter (1), a polarizing plate (3) for adjusting the polarization planes of the light beams having passed through the condensing part (2), and a spatial light modulator (4) having a phase modulation part and an intensity modulation part where the light beams having passed through the polarizing plate (3) are incident.
Claims (7)
1. An optical waveform shaping device (10) comprising:
a branching filter (1) for branching the light beam from a light source into light beams of each frequency;
a condensing part (2) for condensing a plurality of light beams branched by the branching filter (1);
a polarizing plate (3) for adjusting the polarization planes of the light beams having passed through the condensing part (2); and a spatial light modulator (4) having a phase modulation part and an intensity modulation part where the light beams having passed through the polarizing plate (3) are incident.
a branching filter (1) for branching the light beam from a light source into light beams of each frequency;
a condensing part (2) for condensing a plurality of light beams branched by the branching filter (1);
a polarizing plate (3) for adjusting the polarization planes of the light beams having passed through the condensing part (2); and a spatial light modulator (4) having a phase modulation part and an intensity modulation part where the light beams having passed through the polarizing plate (3) are incident.
2. The optical waveform shaping device as claimed in Claim 1, wherein the branching filter (1) comprises a high-dispersion element.
3. The optical waveform shaping device as claimed in Claim 1, wherein the spatial light modulator (4) comprises:
an intensity modulation part (22) having a plurality of liquid crystal cells (21) formed in a line or in a matrix; and a phase modulation part (24) having a plurality of liquid crystal cells (23) corresponding to the liquid crystal cells (21) of the intensity modulation part, and wherein the orientation of liquid crystals of the intensity modulation part is 45 degrees offset from the orientation of liquid crystals of the phase modulation part.
an intensity modulation part (22) having a plurality of liquid crystal cells (21) formed in a line or in a matrix; and a phase modulation part (24) having a plurality of liquid crystal cells (23) corresponding to the liquid crystal cells (21) of the intensity modulation part, and wherein the orientation of liquid crystals of the intensity modulation part is 45 degrees offset from the orientation of liquid crystals of the phase modulation part.
4. The optical waveform shaping device as claimed in Claim 1, wherein the spatial light modulator (4) comprises:
an intensity modulation part (22) having a plurality of liquid crystal cells (21) formed in a line or in a matrix; and a phase modulation part (24) having a plurality of liquid crystal cells (23) corresponding to the liquid crystal cells (21) of the intensity modulation part, wherein each of the liquid crystal cells (21) of the intensity modulation part (22) and the liquid crystal cells (23) of the phase modulation part (24) comprises liquid crystal substances and electrodes which exist holding the liquid crystal substances therebetween, and wherein the optical waveform shaping device comprises:
a detection part (31) for detecting output light from the optical waveform shaping device (21) when the intensity modulation by the intensity modulation part (22) is performed;
a control device (32) for receiving information on the optical phase shifting of each frequency detected by the detection part (31) and controlling the voltage applied to the electrodes of each liquid crystal cell (23) of the phase modulation part (24);
a voltage adjustment part (33) for each liquid crystal cell of the phase modulation part (24) which outputs the voltage applied to the electrodes of each liquid crystal cell (23) of the phase modulator (24) in accordance with the control instructions from the control device (32).
an intensity modulation part (22) having a plurality of liquid crystal cells (21) formed in a line or in a matrix; and a phase modulation part (24) having a plurality of liquid crystal cells (23) corresponding to the liquid crystal cells (21) of the intensity modulation part, wherein each of the liquid crystal cells (21) of the intensity modulation part (22) and the liquid crystal cells (23) of the phase modulation part (24) comprises liquid crystal substances and electrodes which exist holding the liquid crystal substances therebetween, and wherein the optical waveform shaping device comprises:
a detection part (31) for detecting output light from the optical waveform shaping device (21) when the intensity modulation by the intensity modulation part (22) is performed;
a control device (32) for receiving information on the optical phase shifting of each frequency detected by the detection part (31) and controlling the voltage applied to the electrodes of each liquid crystal cell (23) of the phase modulation part (24);
a voltage adjustment part (33) for each liquid crystal cell of the phase modulation part (24) which outputs the voltage applied to the electrodes of each liquid crystal cell (23) of the phase modulator (24) in accordance with the control instructions from the control device (32).
5. The optical waveform shaping device (10) as claimed in Claim 1, further comprising a reflective part (5) where the light beams having passed through the spatial light modulator (4) are incident.
6. The optical waveform shaping device (10) as claimed in Claim 1, further comprising a second condensing lens (11) where the light beams having passed through the spatial light modulator (4), and an optical multiplexer (12) where the light beams having passed through the second condensing lens (11) are incident to multiplex the light beams separated into a plurality of frequencies.
7. An optical waveform shaping device (10) comprising:
a grating (1) for branching the light beam from a light source into light beams of each frequency;
a condensing lens (2) for condensing the plurality of light beams branched by the grating (1);
a polarizing plate(3) for adjusting the polarization planes of the light beams having passed through the condensing lens (2);
a spatial light modulator (4) having a phase modulation part and an intensity modulation part where the light beams having passed through the polarizing plate (3) are incident, wherein the orientation of liquid crystals of the phase modulation part is parallel to the polarization planes adjusted by the polarizing plate (3), the phase modulation part and the intensity modulation part each having a plurality of liquid crystal cells in a line or in a matrix existing in corresponding spatial positions, and the orientation of liquid crystals of the intensity modulation part is 45 degrees offset from the orientation of liquid crystals of the phase modulation part; and a folded reflector where the light beams having passed through the spatial light modulator (4) are incident, wherein the light beam from a light source is frequency separated and is dispersed spatially by the grating (1), wherein the frequency separated and spatially dispersed light beams are condensed by the condensing lens (2), wherein the polarization planes of the condensed light beams are adjusted by the polarizing plate (3), and wherein the light beams with the polarization planes adjusted separately are subjected to separately controlled phase modulation and intensity modulation by the spatial light modulator (4), the light beams folded by the folded reflector (5), condensed through the condensing lens (2) and the frequency separated light beams multiplexed by the grating (1).
a grating (1) for branching the light beam from a light source into light beams of each frequency;
a condensing lens (2) for condensing the plurality of light beams branched by the grating (1);
a polarizing plate(3) for adjusting the polarization planes of the light beams having passed through the condensing lens (2);
a spatial light modulator (4) having a phase modulation part and an intensity modulation part where the light beams having passed through the polarizing plate (3) are incident, wherein the orientation of liquid crystals of the phase modulation part is parallel to the polarization planes adjusted by the polarizing plate (3), the phase modulation part and the intensity modulation part each having a plurality of liquid crystal cells in a line or in a matrix existing in corresponding spatial positions, and the orientation of liquid crystals of the intensity modulation part is 45 degrees offset from the orientation of liquid crystals of the phase modulation part; and a folded reflector where the light beams having passed through the spatial light modulator (4) are incident, wherein the light beam from a light source is frequency separated and is dispersed spatially by the grating (1), wherein the frequency separated and spatially dispersed light beams are condensed by the condensing lens (2), wherein the polarization planes of the condensed light beams are adjusted by the polarizing plate (3), and wherein the light beams with the polarization planes adjusted separately are subjected to separately controlled phase modulation and intensity modulation by the spatial light modulator (4), the light beams folded by the folded reflector (5), condensed through the condensing lens (2) and the frequency separated light beams multiplexed by the grating (1).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2008/001539 WO2008155894A1 (en) | 2007-06-15 | 2008-06-13 | Optical waveform shaping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2690852A1 true CA2690852A1 (en) | 2008-12-24 |
| CA2690852C CA2690852C (en) | 2012-01-10 |
Family
ID=42224861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2690852A Active CA2690852C (en) | 2008-06-13 | 2008-06-13 | Optical waveform shaping device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2690852C (en) |
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2008
- 2008-06-13 CA CA2690852A patent/CA2690852C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2690852C (en) | 2012-01-10 |
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