Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1994-11-09
1996-06-18
Lerner, Martin
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359283, 359484, 372703, G02B 530, G02B 2728, G02F 109
Patent
active
055284159
ABSTRACT:
An optical isolator is disclosed that is particularly useful in the visible, infrared, and near-infrared portions of the electromagnetic spectrum. The rotator portion of the isolator produces a highly uniform magnetic intensity across its clear aperture. The optical isolator comprises a Faraday rotator that defines an optical axis, a respective polarizer on each end of the Faraday rotator and positioned on the optical axis, and a housing containing the Faraday rotator and the polarizers. The Faraday rotator comprises an optical rotator rod that defines the optical axis and a magnet assembly surrounding the optical rotator rod. The magnet assembly comprises eight trapezoidal cross section magnet sections arranged in a first group of four and a second group of four. The magnet sections in each group are placed adjacent one another along their respective nonparallel sides to form an overall square cross section for each group with a square cross section aperture through each group that surrounds the optical rotator rod. The first and second groups are arranged linearly adjacent to one another along the optical axis of the optical rod. The first group has its magnetic field perpendicular to and directed axially away from, the optical axis, and the second group has its magnetic field perpendicular to and directed axially towards, the optical axis of the optical rod.
REFERENCES:
patent: H1155 (1993-03-01), Fratello et al.
patent: 3360323 (1967-12-01), Weisman et al.
patent: 3944329 (1976-03-01), Lee, Jr. et al.
patent: 3971723 (1976-07-01), Tajima et al.
patent: 4178073 (1979-12-01), Uchida et al.
patent: 4522473 (1985-06-01), Hibiya et al.
patent: 4609257 (1986-09-01), Shirasaki
patent: 4612500 (1986-09-01), Chen et al.
patent: 4647887 (1987-03-01), Leupold
patent: 4671621 (1987-06-01), Dillon, Jr. et al.
patent: 4692732 (1987-09-01), Leupold et al.
patent: 4756607 (1988-07-01), Watanabe et al.
patent: 4764743 (1988-08-01), Leupold et al.
patent: 4818080 (1989-04-01), Glasheen
patent: 4856878 (1989-08-01), Wilson et al.
patent: 4909612 (1990-03-01), Scerbak et al.
patent: 4952014 (1990-08-01), Lieberman et al.
patent: 4960331 (1990-10-01), Goldman et al.
patent: 4969743 (1990-11-01), Cote et al.
patent: 5029953 (1991-07-01), Dexter et al.
patent: 5033830 (1991-07-01), Jameson
patent: 5048937 (1991-09-01), Takeda et al.
patent: 5052786 (1991-10-01), Schutz
patent: 5068860 (1991-11-01), Hartemann et al.
patent: 5078512 (1992-01-01), Ando
patent: 5087984 (1992-02-01), Heiney et al.
patent: 5115340 (1992-05-01), Tidwell
patent: 5127019 (1992-06-01), Epstein et al.
patent: 5161049 (1992-11-01), Tanno et al.
patent: 5204771 (1993-04-01), Koga
patent: 5216400 (1993-06-01), Leupold
patent: 5237445 (1993-08-01), Kuzuta
K. P. Birch, A Compact Optical Isolator, Optics Communications, vol. 43, No. 2, Sep. 15, 1982, pp. 79-84.
Zhu Huanan, High Performance Magnets in China for Optical Isolators for 1064 nm and Near Infrared Wavelengths, Optics Engineering Reports, Nov. 1991.
Gauthier et al., Simple, Compact, High-Performance Permanent-Magent Faraday Isolator, Optical Society of America, vol. 11, No. 10, Oct. 1986, pp. 623-625.
Wilson, Optical Isolators Cut Feedback in Visible and Near-IR Lasers, Laser Focus/Electro-Optics, Dec. 1988, pp. 103-108.
Manzi, Terbium Gallium Garnet--Putting A New Spin On Things, Lasers & Optronics, Feb. 1989, pp. 63-65.
DeShazer et al., Optical Isolator for Near Infrared, The Review of Scientific Insturments, vol. 38, No. 2, Feb. 1967, pp. 248-250.
Schmitt et al., Permanent-Magnet Faraday Isolators for Q-Switched Nd:YAG Laser Applications, SPIE vol. 912 Pulsed Single-Frequency Lasers: Technology and Applications (1988), pp. 206-213.
Shiraishi et al., Compact Faraday Rotator for an Optical Isolator Using Magnets Arranged with Alternating Polarities, Optical Society of America, vol. 11, No. 2, Feb. 1986, pp. 82-84.
Weber, Faraday Rotator Materials for Laser Systems, SPIE vol. 681 Laser and Nonlinear Optical Materials (1986), pp. 75-90.
Product Brochure of Litton Airtron, Jul. 1991.
Gauthier Daniel J.
Robinson Hugh G.
Duke University
Lerner Martin
LandOfFree
Compact enhanced performance optical isolator using a faraday ro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compact enhanced performance optical isolator using a faraday ro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact enhanced performance optical isolator using a faraday ro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-227377