Optical waveguides – With optical coupler – Input/output coupler
Patent
1997-12-02
1999-10-19
Bovernick, Rodney
Optical waveguides
With optical coupler
Input/output coupler
G02B 634
Patent
active
059701900
ABSTRACT:
A grating-in-etalon wavelength division multiplexing device is disclosed. In one aspect the device includes an etalon structure with a single volume (or Bragg) diffraction grating, multiple superimposed volume diffraction gratings or a binary volume supergrating is interposed between the reflective opposed faces of the etalon. The etalon includes a tilt mechanism for tilting one or both of the reflective faces at a preselected angle with respect to each other from the parallel. A multiple wavelength light beam is directed through the volume grating in different preselected directions so that light of wavelengths satisfying the Bragg condition on each traversal of the grating is diffracted in a direction different from the direction of the incident beam. The diffracted beam exits the etalon and is wavelength interrogated in a detector while the undiffracted wavelengths propagate through the grating to be reflected from the opposed mirror face back through the volume grating. On this traversal the diffracted light exits through the other side of the etalon and is wavelength interrogated in another wavelength sensitive light detector. In another aspect of the invention the WDM device is fabricated from an etalon waveguide with reflective opposed faces and having a Bragg grating (or multiple gratings) written into the waveguide between the reflective faces. Polarization insensitivity is achieved by writing in two sets of gratings, one set to diffract ordinary polarized light and the other to diffract extraordinary polarized light so that when polarization state of light changes, the diffraction efficiencies are relatively the same.
REFERENCES:
patent: 3498693 (1970-03-01), Fein et al.
patent: 4871235 (1989-10-01), Greene et al.
patent: 5119454 (1992-06-01), McMahon
patent: 5144498 (1992-09-01), Vincent
patent: 5321539 (1994-06-01), Hirabayashi et al.
patent: 5664032 (1997-09-01), Bischel et al.
Friday Morning/CLEO '96, pp. 513-514, Friday, Jun. 7, 1996.
IEEE Photonics Technology Letters, vol. 3, No. 10, pp. 896-899, Integrated Optics N.times.N Multiplexer on Silicon, C. Dragone, C.A. Edwards and R.C. Kistler.
Appl. Phys. Letter, vol. 69, No. 10, Sep. 2, 1991, pp. 1144-1146, Highly Multiplexed Graded-Index Polymer Waveguide Hologram For Near-Infrared Eight-Channel Wavelength Division Demuliplexing, Ray T. Chen, Huey Lu, Daniel Robinson, and Tomasz Jannson.
Electronics Letters, Jan. 17, 1991, vol. 27 No. 2, pp. 132-134, Monolitchi InP-Grating Spectrometer For Wavelength-Division Multiplexed Systems At 1-5.mu.m.
IEEE Photonics Technology Letters, vol. 4, No. 10, Oct. 1992, pp. 1115-1117, Diffraction Characteristics of Superimposed Holographic Gratings in Planar Optical Waveguides, V. Minier, A. Kevorkian, and J.M. Xu.
Journal of Lightwave Technology, vol. 6, No. 6, Jun. 1988, pp. 1011-1015, Integrated Four-Channel Mach-Zehnder Multi-Demultiplexer Fabricated With Phosphorous Doped SiO.sub.2 Waveguides on Si, B. H. Verbee; C. H. Henry; N. A. Olsson; K. J. Orlowsky; R. F. Kazarinov; Nd B. H. Johnson.
IEEE Photonics Technology Letters, vol. 3, No. 10, Oct. 1991, pp. 899-901, Grating-Assisted Directional Coupler Filters Using A1GaAs/GaAs MQW Waveguides, Hajime Sakata and Shinsuke Takeuchi.
Fu Xiaoli
Xu Jingming
Bovernick Rodney
Photonics Research Ontario
Schumacher Lynn
Wise Robert E.
LandOfFree
Grating-in-etalon polarization insensitive wavelength division m does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Grating-in-etalon polarization insensitive wavelength division m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Grating-in-etalon polarization insensitive wavelength division m will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2066593