Mahgerefteh
Daniel Mahgerefteh, San Francisco, CA US
Patent application number | Description | Published |
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20100098436 | METHOD AND APPARATUS FOR GENERATING SIGNALS WITH INCREASED DISPERSION TOLERANCE USING A DIRECTLY MODULATED LASER TRANSMITTER - An optical transmitter is disclosed wherein a signal processor receives a data stream and outputs a drive signal for a laser, where the drive signal encodes each bit of the data stream according to the values of adjacent bits effective to compensate for spreading of bits within the fiber. The output of the laser is input to an optical spectrum reshaper that outputs a signal having an enhanced extinction ratio. | 04-22-2010 |
20100329666 | THERMAL CHIRP COMPENSATION IN A CHIRP MANAGED LASER - Thermal chirp compensation in a chirp managed laser. In one example embodiment, a method for thermal chirp compensation in a chirp managed laser (CML) includes several acts. First, a first bias condition and temperature is selected. Next, a first thermal chirp compensation signal is generated. Then, the laser is driven by biasing a first input drive signal with the first thermal chirp compensation signal. Next, a second bias condition and temperature is selected. Then, a second thermal chirp compensation signal is generated. Finally, the laser is driven by biasing a second input drive signal with the second thermal chirp compensation signal. | 12-30-2010 |
Daniel Mahgerefteh, Somerville, MA US
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20100226395 | GAIN-SWITCHED FIBER LASER SYSTEM - This invention discloses a method to control laser dynamics in a gain-switched fiber laser so as to generate stable, clean pulses in an all-fiber format. The gain-switched fiber laser is suitable as a standalone laser source, and as a pump source for harmonic generation and an optical-parametric-oscillator. | 09-09-2010 |
Daniel Mahgerefteh, Los Angeles, CA US
Patent application number | Description | Published |
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20120251130 | THERMAL CHIRP COMPENSATION IN A CHIRP MANAGED LASER - Thermal chirp compensation in a chirp managed laser. In one example embodiment, a laser package including a laser and an optical spectrum reshaper configured to convert frequency modulated optical signals from the laser into an amplitude modulated optical signals is provided. A thermal chirp compensation device is in communication with the laser package and a laser driver. The thermal chirp compensation device includes means for generating bias condition and temperature specific thermal chirp compensation signals that each corresponds to a predetermined level of thermal chirp that is induced in the laser by operating the laser at a particular bias condition and temperature. | 10-04-2012 |
20130279912 | BANDWIDTH EFFICIENT DUAL CARRIER - In some examples, a transmit assembly is described that may include a first optical transmitter, a second optical transmitter, and a polarizing beam combiner. The first optical transmitter may be configured to emit a first optical data signal centered at a first frequency. The second optical transmitter may be configured to emit a second optical data signal centered at a second frequency offset from the first frequency by a nominal offset n. The polarizing beam combiner may be configured to generate a dual carrier optical data signal by polarization interleaving the first optical data signal with the second optical data signal. An output of the polarizing beam combiner may be configured to be communicatively coupled via an optical transmission medium to a polarization-insensitive receive assembly. | 10-24-2013 |