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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Swanson; Eric A.
Address:
Acton, MA
No. of patents:
17
Patents:












Patent Number Title Of Patent Date Issued
6891984 Scanning miniature optical probes with optical distortion correction and rotational control May 10, 2005
Optical probes having a diameter less than substantially 500 .mu.m for use in scanning light from a long, highly flexible fiber to a sample. In one embodiment the probe includes a viscous damping fluid suitable to prevent non-uniform rotational distortion (NURD).
6580531 Method and apparatus for in circuit biasing and testing of a modulated laser and optical receive June 17, 2003
A method and apparatus for in-circuit biasing of a modulated laser and bit error rate testing of an optical transmitter and/or optical receiver under the control of a test controller. The test controller is communicably coupled to an interface of a module under test, as well as to extern
6552797 Freezing point measurement with OCDR and OCT technology April 22, 2003
An invention pertaining to the measurement of the freezing point of substances using OCDR and OCT.technology.
6501551 Fiber optic imaging endoscope interferometer with at least one faraday rotator December 31, 2002
An imaging system for performing optical coherence tomography includes an optical radiation source; a reference optical reflector; a first optical path leading to the reference optical reflector; and a second optical path coupled to an endoscopic unit. The endoscopic unit preferably incl
6485413 Methods and apparatus for forward-directed optical scanning instruments November 26, 2002
An imaging system for performing forward scanning imaging for application to therapeutic and diagnostic devises used in medical procedures. The imaging system includes forward directed optical coherence tomography (OCT), and non-retroreflected forward scanning OCT. Also interferometric
6456409 Method and apparatus for extending fiber transmission distance with multiple pre-emphases in opt September 24, 2002
A Dense Wavelength Division Multiplexed (DWDM) optical transmission system that compensates for unequal channel performance over an extended fiber transmission distance. The DWDM optical transmission system includes optical transmitters at a transmitter end of a transmission path for
6433904 Method and apparatus for improving transmission performance over wavelength division multiplexed August 13, 2002
Data transmission apparatus includes first and second optical transmitters coupled to an optical link. A forward error correction (FEC) coder is coupled to the input of the second optical transmitter. A first information signal having a first information rate is provided to the first
6430201 Method and apparatus for transporting gigabit ethernet and fiber channel signals in wavelength-d August 6, 2002
Multiple gigabit Ethernet (GbE) and Fiber Channel (FC) signals are multiplexed and transported on a wavelength-division multiplexed (WDM) communications link using synchronous optical network (SONET) signaling. A transmitter decodes the 8b/10b encoded GbE/FC signals to reduce their r
6191862 Methods and apparatus for high speed longitudinal scanning in imaging systems February 20, 2001
An imaging system wherein an optical signal is transmitted to both a sample to be measured and a rotating element which is calibrated to the system. A return signal is detected by the system, and a scan analyzer and correction unit uses the system calibration information along with s
6160826 Method and apparatus for performing optical frequency domain reflectometry December 12, 2000
Method of performing OFDR on a sample comprising steps of: providing an external-cavity frequency-tuned laser having an optical cavity of effective length; tuning the laser to generate a change in wavelength; changing the effective length of the optical cavity proportionally to the c
6134003 Method and apparatus for performing optical measurements using a fiber optic imaging guidewire, October 17, 2000
An imaging system for performing optical coherence tomography includes an optical radiation source; a reference optical reflector; a first optical path leading to the reference optical reflector; and a second optical path coupled to an endoscopic unit. The endoscopic unit preferably incl
5956355 Method and apparatus for performing optical measurements using a rapidly frequency-tuned laser September 21, 1999
An optical system, in one embodiment including an external-cavity frequency-tuned laser having a tunable longitudinal cavity mode and a center tunable wavelength. The external-cavity frequency-tuned laser includes an optical cavity, an optical gain medium positioned within the optica
5784352 Apparatus and method for accessing data on multilayered optical media July 21, 1998
Apparatus and methods for accessing data on a multilayered optical storage medium. The apparatus uses the time-of-flight of illumination directed to and reflected by the layers of the optical medium to access data stored on a desired layer of the medium. More particularly, alterations in
5748598 Apparatus and methods for reading multilayer storage media using short coherence length sources May 5, 1998
Apparatus and methods for reading multilayer optical data storage media are described. The apparatus includes a short coherence length light source and an optical system. The optical system focuses the light from the source onto the layers of the storage media. The coherence length of th
5619368 Optical frequency shifter April 8, 1997
An optical wavelength converter is provided that utilizes an optical interferometer configured to efficiently and rapidly shift the frequency of an optical signal and to automatically separate a pump signal from the optical signal and a frequency-shifted signal. The wavelength converter
5465147 Method and apparatus for acquiring images using a ccd detector array and no transverse scanner November 7, 1995
An apparatus and method for acquiring an at least one dimensional digital image of a region of an object using an optical source which outputs a first optical beam having a short coherence length. A splitter splits the first optical beam into a reference beam and an object beam. The refe
5321501 Method and apparatus for optical imaging with means for controlling the longitudinal range of th June 14, 1994
A method and apparatus for performing optical imaging on a sample wherein longitudinal scanning or positioning in the sample is provided by either varying relative optical path lengths for an optical path leading to the sample and to a reference reflector, or by varying an optical ch










 
 
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