公开(公告)号：US11159249B2

公开(公告)日：2021-10-26

申请号：US17066624

申请日：2020-10-09

Applicant: X DEVELOPMENT LLC

Inventor： Bruce Moision ,  Devin Brinkley ,  Baris Ibrahim Erkmen

IPC: H04B10/80 ,  H04B10/291 ,  H04B10/564

Abstract: An optical communication system includes an optical transmitter and one or more processors. The optical transmitter is configured to output an optical signal, and includes an average-power-limited optical amplifier, such as an erbium-doped fiber amplifier (EDFA). The one or more processors are configured to receive optical signal data related to a received power for a communication link from a remote communication system and determine that the optical signal data is likely to fall below a minimum received power within a time interval. In response to the determination, the one or more processors are configured to determine a duty cycle of the optical transmitter based on a minimum on-cycle length and a predicted EDFA output power and operate the optical transmitter using the determined duty cycle to transmit an on-cycle power that is no less than the minimum required receiver power for error-free operation of the communication link.

公开(公告)号：US11054580B2

公开(公告)日：2021-07-06

申请号：US16818183

申请日：2020-03-13

Applicant: X DEVELOPMENT LLC

Inventor： Andrei Kazmierski ,  Nam-hyong Kim ,  Devin Brinkley ,  Baris Ibrahim Erkmen

IPC: G02B6/36 ,  G02B6/32 ,  F21V8/00 ,  G02B9/04 ,  G02B27/09

Abstract: An optical communication device is provided that includes a first lens having a first surface and a second surface, a second lens having a third surface and a fourth surface, an optical fiber configured to output light including a plurality of ray bundles, and a photodetector located at the fourth surface of the second lens. The first lens is configured to cause the light output from the optical fiber to form an image at an image plane located at the third surface of the second lens. The second lens is configured to cause subsets of the ray bundles received at the third surface of the second lens to intersect or overlap at the photodetector in a smaller cross-sectional area than at the third surface of the second lens.

公开(公告)号：US20210111797A1

公开(公告)日：2021-04-15

申请号：US17070585

申请日：2020-10-14

Applicant: X Development LLC

Inventor： Travis Lantz ,  Paul Csonka ,  Baris Ibrahim Erkmen

IPC: H04B10/114 ,  H04W16/28 ,  H04B10/077 ,  H04B10/079

Abstract: The disclosure provides for a method for reacquiring a communication link between a first communication device and a second communication device. The method includes using one or more processors of the first communication device to receive historical data related to the first communication device and an environment surrounding the first communication device. The one or more processors are then used to determine one or more trends in the historical data related to fading of the communication link. Based on the one or more trends, the one or more processors are used to determine a starting time and an initial search direction for a search for the communication link. The one or more processors then execute the search at the starting time from the initial search direction.

公开(公告)号：US09939651B1

公开(公告)日：2018-04-10

申请号：US15664424

申请日：2017-07-31

Applicant: X Development LLC

Inventor： Robert Todd Belt ,  Nam-hyong Kim ,  Baris Ibrahim Erkmen ,  Edward Allen Keyes

IPC: G02B27/14 ,  H04B10/508 ,  H04B10/572 ,  G02B17/04

CPC classification number: G02B27/145 ,  G02B17/04 ,  G02B27/141 ,  H04B10/508 ,  H04B10/572

Abstract: An example beam splitting apparatus is assembled from multiple prisms that are assembled together along respective mating surfaces to form a single monolithic optical device. The beam splitting apparatus includes optical features, such as dichroic and reflective surfaces, that define optical paths for light that enters the beam splitting apparatus. The optical features allow photons in the light to be directed along different optical paths based on their wavelengths. The optical features in the beam splitting apparatus are provided by coatings, films, and/or surface treatments applied to any of the faces of the prisms. In particular, coatings, films, and/or surface treatments are applied to the mating surfaces of the prisms so that the optical features are internal to the assembled monolithic optical device. The beam splitting apparatus may be implemented in a communication terminal that exchanges data modulated light according to frequency-division duplex communications.