Polarization maintaining coupler
Granted: November 11, 2004
Application Number:
20040223678
A polarization maintaining coupler is provided that allows a user to change the coupling ratio of two or more output fibers. The coupler can include an assembly containing a PM fiber in a ferrule. The ferrule is attached to a housing, which includes a lens for collimating light from the PM fiber onto an optical component that splits the incoming polarized light into two orthogonally polarized components. Each of these orthogonal components is then output into a separate PM or single mode…
Method and apparatus for monitoring a photo-detector
Granted: November 11, 2004
Application Number:
20040222360
In an embodiment of the invention the circuit for monitoring an optical signal detector comprises a current divider current mirror and a current multiplier current mirror. The current divider current mirror has a mirror leg and a primary leg. The primary leg is coupled to the optical signal detector. The current divider current mirror is configured to generate mirror leg current corresponding with a fraction of the primary leg current. The current multiplier current mirror has a mirror…
Memory mapped monitoring circuitry for optoelectronic device
Granted: September 9, 2004
Application Number:
20040175172
Circuitry for monitoring operation of an optoelectronic device having a laser transmitter and a photodiode receiver includes analog to digital conversion circuitry for receiving a plurality of analog signals from the laser transmitter and photodiode receiver, converting the received analog signals into digital values, and storing the digital values in predefined memory-mapped locations within the optoelectronic device. Comparison logic compares one or more of these digital values with…
Calibration of a multi-channel optoelectronic module with integrated temperature control
Granted: August 19, 2004
Application Number:
20040161001
A method for calibrating a multi-channel laser emitter in an optoelectronic transceiver or an optoelectronic transmitter for a first wavelength includes monitoring the wavelength of optical signals from the laser emitter while varying its temperature as well as other operating conditions, and then storing calibration information in the memory of a microprocessor. The initial values of the calibrating procedure are reset and the calibrating procedure is repeated to obtain calibration…
Small form factor optical transceiver with extended transmission range
Granted: August 5, 2004
Application Number:
20040151505
A small form factor transceiver module that incorporates an externally modulated laser (EML). The transceiver module has a transmitter optical subassembly with a header assembly having a base with a platform extending through. The platform has a plurality of conductive traces extending through the platform for making connections on both sides of the base. A thermoelectric cooler (TEC) is used to dissipate heat from a laser within the header assembly. The TEC dissipates heat sufficiently…
System and method of testing a transceiver
Granted: August 5, 2004
Application Number:
20040153267
A system and method for testing the jitter tolerance and signal attenuation tolerance of an optoelectronic device is disclosed. The system includes a generation circuit, delay circuit and comparison circuitry. A first sequence of bits is generated, delayed, and sent to the optoelectronic device. The optoelectronic device receives the bits and retransmits them as a second sequence to the comparison circuitry, which compares the two bit sequences to determine a bit error rate. The bit…
Network analysis omniscent loop state machine
Granted: August 5, 2004
Application Number:
20040153863
Embodiments of the invention provide a method for analyzing a data trace representative of an FC network. The method includes determining a topology of the network, filtering the data trace for open commands that are not perceived by at least one analyzer positioned in communication with the network and eliminating devices associated with these open commands not received by an analyzer from further analysis, filtering the data trace for failed open commands and eliminating devices…
Asymmetric optical focusing system
Granted: July 22, 2004
Application Number:
20040141239
An optical focusing system for a MOPA device that produces an astigmatic optical beam that includes a pair of lenses for focusing the optical beam into a single mode optical fiber. The optical beam has separated first and second focal points of origin. The first lens is placed one focal length away from the nearest focal point of origin for collimating the light beam in the vertical plane of beam propagation, while focusing the horizontal plane of beam propagation down into the optical…
In situ adaptive masks
Granted: July 22, 2004
Application Number:
20040142625
A variable adaptive mask is provided that can be dynamically modified in situ in a physical vapor deposition process. The mask comprises a fixed mask portion, a plurality of channels extending through the fixed mask portion, a control mechanism for controlling throughput of a vaporized target material through the channels, and a mechanism to mount the mask in a fixed position relative to a solid target material and a substrate. In one embodiment, a magnetic control mechanism is provided…
Methods, systems, and devices for burn-in testing of optoelectronic devices
Granted: July 15, 2004
Application Number:
20040135595
System and methods for life testing laser diodes is disclosed. The system includes a burn-in rack having a plurality of optoelectronic devices mounted within respective holders and electrical signal connectors that electrically couple the optoelectronic devices to a first electrical connector. A test apparatus holds the burn-in rack and has optical detectors arranged to receive electromagnetic radiation from the mounted optoelectronic devices and couple the output signals from the…
Process for improving yield of DFB lasers
Granted: July 8, 2004
Application Number:
20040131099
A distributed feedback (DFB) laser is constructed such that a laser stripe has a minimum tilt angle with respect to a cleaved facet in order to reduce the facet reflectivity. A method for improving the yield of distributed feedback lasers is also provided. The method includes selecting a tilt angle and antireflection coating to achieve a desired effective facet reflectivity. In one embodiment, a range of tilt angles and facet coatings is tested to determine a statistical correlation…
Storing, retrieving and displaying captured data in a network analysis system
Granted: July 8, 2004
Application Number:
20040133733
Analyzing data on a network. A method of analyzing data on a network is disclosed. The method includes capturing network traffic on the network during a period of time where the network traffic is captured as raw data into data blocks. The data blocks are streamed to a mass storage. The data blocks are organized into logical blocks on the mass storage. A set of data points are compiled. The data points are useful for defining information about the logical blocks. The data points include…
System and method for measuring concentricity of laser to cap
Granted: June 24, 2004
Application Number:
20040119988
A device and method is disclosed for passively checking the concentricity measurement of optical components in an optical assembly. The optical assembly includes a package for a photonic device which has a header and a lens cap having an integrated lens. The photonic device is mounted to the header. A display system can be used to view the photonic device through the lens of the cap. Using a camera with a high magnification lens integrated into the display system, the alignment between…
Counterbore base member for ferrule-type optical connector
Granted: June 24, 2004
Application Number:
20040120655
An optical connector includes a base member having a first hollow bore extending from a first end toward a second end, and a recess coaxially aligned with the first hollow bore. The recess has a first internal perimeter and a second internal perimeter. The first perimeter is smaller than said second perimeter. The base member can have a post extending up from a bottom of the recess. The first hollow bore passes through the past and terminates at an end of the post. The post can have an…
System and method of measuring a signal propagation delay
Granted: June 24, 2004
Application Number:
20040122607
The present invention relates generally to an improvement in the ability of test systems to test bit processing capacities of electronic devices, and in particular an improvement in their ability to measure a signal propagation delay through an object connected to an optoelectronic device. The present invention includes determining for how long after a specific bit or bit group is transmitted by an optical transceiver the bit or bit group is received at the other end of the object…
System and method for protecting eye safety during operation of a fiber optic transceiver
Granted: June 3, 2004
Application Number:
20040105679
A single-chip integrated circuit, sometimes called a controller, controls operation of a transceiver having a laser transmitter and a photodiode receiver. The controller includes memory for storing information related to the transceiver, and analog to digital conversion circuitry for receiving a plurality of analog signals from the laser transmitter and photodiode receiver, converting the received analog signals into digital values, and storing the digital values in predefined locations…
Integrated memory mapped controller circuit for fiber optics transceiver
Granted: May 27, 2004
Application Number:
20040100687
A controller for controlling a transceiver having a laser transmitter and a photodiode receiver. The controller includes memory for storing information related to the transceiver, and analog to digital conversion circuitry for receiving a plurality of analog signals from the laser transmitter and photodiode receiver, converting the received analog signals into digital values, and storing the digital values in predefined locations within the memory. Comparison logic compares one or more…
Methods and devices for monitoring the wavelength and power of a laser
Granted: May 13, 2004
Application Number:
20040090620
A wavelength locker. The wavelength locker can be mounted within an optical transceiver on a submount with the laser diode. The wavelength locker utilizes light emitted by the back facet of the laser to monitor the wavelength and power of the laser. The light is separated into two portions, at least one of which is passed through a filter to shift the wavelength thereof. Separate monitor diodes or photosensitive areas of a single monitor diode are used to measure the output of each…
Differential press tool
Granted: May 6, 2004
Application Number:
20040083907
Embodiments of the invention generally provide a fixture for assembling an optical component. The fixture includes a substantially rigid base member having an upper surface and a lower surface with a base aperture connecting the two surfaces and a component mounting plate positioned on the upper surface and having an aperture formed therein corresponding to the base aperture. The fixture further includes at least one pivotally mounted component disengagement member positioned on the…
Top press tool
Granted: May 6, 2004
Application Number:
20040083908
Embodiments of the invention generally provide a fixture for assembling an optical component. The fixture generally includes a substantially rigid base member having a measurement aperture formed therein, a pair of upstanding frame members, each of the upstanding frame members having a pivotal mount and a vertical slot formed therein, and a support press slidably positioned within the vertical slot. The fixture may further include a component support assembly positioned below the support…
