公开(公告)号：JP2000278249A

公开(公告)日：2000-10-06

申请号：JP2000058296

申请日：2000-03-03

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ALFONSO B PICCIRILLI ,  PRESBY HERMAN MELVIN

IPC: H04B10/00 ,  H04J14/00 ,  H04J14/02 ,  H04K1/00 ,  H04L9/34

Abstract: PROBLEM TO BE SOLVED: To provide data protection engineering originally safe to the interception of signals by carrying data contents with the energy of two or more wavelengths in an optical output signal to be transmitted. SOLUTION: Inside a transmitter 15, a first part 35-1 of an input data flow 10 is allocated to a first wavelength channel, a second part 35-2 is allocated to a second wavelength channel, the following parts are similarly allocated and a final part 35-N is allocated to a channel N of the largest number. This allocation is performed according to a time window designated to each wavelength channel by a channel allocating function element 40. Then, the individual parts of these allocated data are multiplexed to a single output data flow 20 by a multiplexing function element 45 and carried with the energy of different wavelengths. This data flow 20 is demultiplexed by a demultiplexing function element 50 in a receiver 25 and concatenated by a concatenating function element 60 and a recovered data floe 30 is generated.

公开(公告)号：JPH1184277A

公开(公告)日：1999-03-26

申请号：JP17558798

申请日：1998-06-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HENRY CHARLES H ,  PRESBY HERMAN MELVIN

IPC: G02B6/38 ,  G02B6/12 ,  G02B6/13 ,  G02B6/26 ,  G02B6/35 ,  G02B26/08 ,  H04B10/02

Abstract: PROBLEM TO BE SOLVED: To provide a self-aligning M×N optical switch which is low in insertion loss and is mechanically stable. SOLUTION: Monolithic silica optical structural bodies 30, 40, 50 are cut out along cleavage planes in order to obtain the three corresponding structural bodies thereof. The first and third structural bodies obtd. in such a manner respectively have cleavage edges 42 and respective sets of waveguides disposed in parallel with the surfaces of the corresponding structural bodies. The second structural body has two substantially parallel cleavage edges 32, 52 and plural sets of the waveguides disposed in parallel with the surfaces of the corresponding structural bodies. The cleavage edge of the second structural body is mounted on the surfaces of the first, second and third bases in such a manner that the corresponding surfaces of the first, second and third structural bodies respectively come within the common plane so that this cleavage edge is adjacent to the corresponding one of the cleavage edges of the first and third structural bodies and is arrayed to face the same.

公开(公告)号：JP2003124883A

公开(公告)日：2003-04-25

申请号：JP2002188851

申请日：2002-06-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PRESBY HERMAN MELVIN ,  TYSON JOHN A

IPC: G02B23/02 ,  G02B26/08 ,  H04B10/02 ,  H04B10/10 ,  H04B10/118 ,  H04B10/18 ,  H04B10/22 ,  H04B10/105

Abstract: PROBLEM TO BE SOLVED: To provide a free space optical communication system whereby the optics of a transmit telescope are manipulated using adaptive optics to precompensate for wave front distortion of a light beam transmitted by a transmit telescope. SOLUTION: Wave front distortion is manifested at the receive telescope as a change in at least one characteristic of the image of the received signal such as, for example, a reduction in the amplitude of the received signal. A mirror of the transmit telescope is deformed in such a way as to reduce the wave front distortion and correspondingly increase the resulting amplitude of the received signal.

公开(公告)号：JP2002202476A

公开(公告)日：2002-07-19

申请号：JP2001309302

申请日：2001-10-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PRESBY HERMAN MELVIN ,  TYSON JOHN A

IPC: G02B23/02 ,  G02B17/06 ,  G02B27/00 ,  G02B27/18 ,  H01L31/12 ,  H04B10/112 ,  H04B10/10 ,  H04B10/105 ,  H04B10/22

Abstract: PROBLEM TO BE SOLVED: To provide an optical telescope for wireless optical communication system provided with at least two aspherical mirrors. SOLUTION: A mirror configuration enables a primary and a secondary mirrors to be positioned closer together than conventional designs, and accordingly, enables a very compact system. The mirrors are thin and lightweight, which enables the realization of a lightweight telescope unit. The mirror configuration provides a larger focal plane, which enables automatic control between a transmitter and a receiver with a fixed mirror design, and further contributes to a lower fabrication cost. In addition, these mirrors can be designed so as to have larger diameters, which enables the transmission of high beam intensities at eye-safe levels since the energy is spread over a large area.

公开(公告)号：JP2002164852A

公开(公告)日：2002-06-07

申请号：JP2001307406

申请日：2001-10-03

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PRESBY HERMAN MELVIN ,  TYSON JOHN A

IPC: H04B10/10 ,  H04B10/118 ,  H04B10/22 ,  H04B10/105

Abstract: PROBLEM TO BE SOLVED: To prevent a communication connectivity from being lost which is caused by deviation at initial alignment or during communication operation in a free space optical communication system. SOLUTION: A free space optical communication system is provided wherein a transmission telescope and a reception telescope are so aligned that the maximum power point of a received optical beam is incident on an optical fiber provided at a specified point on the focal plane of the reception telescope. This is attained by moving a transmission optical fiber to a point in front of the focal plane of the transmission telescope until at least a part of the beam is incident on the reception optical fiber so that the transmission beams is made divergent. The transmission optical fiber gradually moves to before or behind the focal plane of the transmission telescope in response to the reception power measurement in the reception telescope. Thus, the degree of divergence is decreased to provide a higher signal per unit area of the reception telescope.

公开(公告)号：JP2001264595A

公开(公告)日：2001-09-26

申请号：JP2001053270

申请日：2001-02-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DIETRICH MERCUS ,  VICTOR MITCHELL AQUARO ,  GEORGE L FISCHER ,  PRESBY HERMAN MELVIN

IPC: G02B6/42 ,  G02B6/26 ,  G02B6/30 ,  H01S3/30 ,  H01S5/022

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for coupling a multi-mode laser with a multi-mode fiber using a multi-mode tapered structure. SOLUTION: The disclosed multi-mode tapered structure receives a light beam having a beam shape with a high ellipticity and converts the light beam so as to be able to receive it in a circular multi-mode optical fiber. According to one form of this invention, the multi-mode tapered structure has a tapered shape having an ellptical section to match a rectangular laser opening on one end and a circular section to match a fiber core on the other end. The disclosed multi-mode tapered structure is tapered correspondingly from a small dimension of the input end matching that of a multi-mode light source to a large dimension of the output end matching the circular core of a multi-mode fiber. This invention enables a coupling efficiency to be attained as much as 98%, depending on the number of the openings and the selection of the lengths of the multi-mode tapered structure.

公开(公告)号：JPH11153719A

公开(公告)日：1999-06-08

申请号：JP26218298

申请日：1998-09-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MARCUSE DIETRICH ,  PRESBY HERMAN MELVIN

IPC: G02B6/12 ,  G02B6/122 ,  G02B6/42

Abstract: PROBLEM TO BE SOLVED: To provide an optical integrated circuit having a planar waveguide turning mirror. SOLUTION: The optical integrated circuit 100 having the tuning mirror formed by the end face of a planar waveguide 125 forms the deflection surface of the turning mirror. More specifically, the optical integrated circuit includes the planar waveguide formed within a clad layer and in such a case, the planar waveguide has a deflector end face 130 arranged adjacently to a region, such as a spacing. The refractive indices of the planar waveguide 125 and the region have a ratio not smaller than about 1.3 so as to induce desired refractive index discontinuity. The advantageous deflection of an optical signal is made possible by combining this refractive index discontinuity and the arrangement of the deflector end face 130 at an angle within a range of 24 to 67 deg. with the axis extending perpendicularly to the direction of the waveguide.

公开(公告)号：JPH10319447A

公开(公告)日：1998-12-04

申请号：JP12064198

申请日：1998-04-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MARCUSE DIETRICH ,  PRESBY HERMAN MELVIN

IPC: G02F1/335

Abstract: PROBLEM TO BE SOLVED: To provide an optical circuit switch made of slica having a small-sized waveguide structure so as to facilitate the routing of optical signals using an acoustooptical effect. SOLUTION: When an elastic surface wave 125 is not generated, an optical signal from an input part 100 is propagated in an even transmission mode to a first output part 110 via a multimode part 105 by a coupler waveguide structure. However, when a SAW source turns the elastic surface wave to the multimode waveguide part 105 with a specific phase matching angle θ, the optical signal entering to the input part 100 is coupled from the first transmission mode to a second transmission mode in the multimode part 105 and as the result, this power is transferred in the second transmission mode. Then, the optical signal of the second transmission mode is received at the inside of a second output part 115.

公开(公告)号：JP2002185406A

公开(公告)日：2002-06-28

申请号：JP2001309303

申请日：2001-10-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： AHRENS ROBERT G ,  PRESBY HERMAN MELVIN ,  TYSON JOHN A

IPC: G02B23/02 ,  G02B17/08 ,  G02B23/12 ,  H04B10/112 ,  H04B10/118 ,  H04B10/10 ,  H04B10/105 ,  H04B10/22

Abstract: PROBLEM TO BE SOLVED: To provide a free-space optical communications system capable of changing the reception of a signal amplitude on a reception optical fiber of a receiving telescope by dithering the optical beam transmitted by a transmitting telescope or the reception optical fiber to execute the reception of the maximum transmission signal amplitude on the reception optical fiber at a reception focal surface when a contraction of the reception signal amplitude is measured. SOLUTION: In one embodiment, the transmission optical fiber is dithered in a pattern, and the beam to be transmitted in the corresponding pattern is vibrated. The reception signal amplitude of an image on the focal surface of the receiving telescope is vibrated in the same pattern in response to it. A phase of the reception signal is compared with that of transmitted moving beam. Thus, an origin of the dithering pattern of the transmitting beam can be moved until the maximum amplitude of the transmitted beam is incident to the reception optical fiber.

公开(公告)号：JP2002164853A

公开(公告)日：2002-06-07

申请号：JP2001309524

申请日：2001-10-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PRESBY HERMAN MELVIN ,  TYSON JOHN A

IPC: H04B10/10 ,  H04B10/118 ,  H04B10/22 ,  H04B10/105

Abstract: PROBLEM TO BE SOLVED: To provide a free space optical communication system wherein the reception power at a reception optical fiber is reduced by mutually adjusting so that a transmitted optical beam and the reception optical fiber cross each other not at the focal point of the transmitted beam but at a divergent point when a specified power threshold is exceeded. SOLUTION: The transmitted beam is diverged by moving a transmission optical fiber to a point before the focal plane of a transmission telescope along the length axis of the telescope until at least a part of the beam is incident on the reception optical fiber. As a result, the beam enlarges the cross-sectional area of the point where the beam is incident on the reception telescope. Thus, the cross-section electric power per unit area of the transmitted beam reduces, and the power which is incident on the reception optical fiber is reduced accordingly.