Yan Fen Sun

6341034, Jan 22, 2002

Nov 15, 2000

09/711924

Yan Sun - Menlo Park CA
Jun Ye - Palo Alto CA

Onetta Inc. - Sunnyvale CA

H04B 1012

35934141, 3593371, 3593372

Optical amplifiers are provided for use in fiber-optic communications networks. An optical amplifier may be controlled to prevent gain transients. The optical amplifier may use a spectrally-filtered input power tap to monitor input power. Amplifier gain may be controlled based on the monitored spectrally-filtered input power. Gain may be provided using one or more rare-earth-doped fiber coils such as erbium-doped fiber coils. The coils may be pumped by laser diodes or other suitable pumps. The optical output power of the pumps may be controlled by a control unit. The control unit may calculate the appropriate pump power for the pumps to supply to the fiber coils based on the measured spectrally-filtered input power of the amplifier. The output power of the amplifier may also be measured. A combination of feed-forward and feedback techniques may be used to calculate the pump power to be supplied by the pumps.

6377396, Apr 23, 2002

Nov 6, 2000

09/705760

Yan Sun - Menlo Park CA
Chia-Chi Wang - Hillsborough NJ
Yongan Wu - San Jose CA
Jun Ye - Palo Alto CA

Onetta, Inc. - Sunnyvale CA

H04B 1012

35934142, 359341, 359 41

Optical amplifiers with variable optical attenuators that are adjusted using a sublinear control scheme are provided. Instead of increasing the attenuation of the optical attenuator by Y dBs for each desired Y dBs in decreased optical amplifier gain, the attenuation of the variable optical attenuator is increased by less than Y dBs. This sublinear control scheme improves the noise figure performance of the optical amplifier at the expense of increased gain ripple. The overall performance of the optical amplifier may be improved, particularly in conditions in which the attenuations produced by the variable optical attenuator are relatively large.

6417961, Jul 9, 2002

Dec 4, 2000

09/727775

Yan Sun - Menlo Park CA
Chien-Jen Chen - Cupertino CA
William S. Wong - San Jose CA

Onetta, Inc. - Sunnyvale CA

H01S 300

3593375, 359334

Optical amplifiers are provided that have dispersion-compensating fiber that is pumped with an optical source to produce Raman gain. Removable modules of dispersion-compensating fiber, which may be separate from the Raman-pumped dispersion-compensating fiber, may be used to adjust the amount of dispersion compensation provided by a given amplifier. The Raman pump may be formed using fiber-Bragg-grating-stabilized diode lasers or other suitable pump sources. Two cross-polarized diode lasers may be used for the Raman pump to reduce the dependence of the Raman gain on the polarization of the pump. If desired, the dispersion-compensating fiber may be Raman pumped using a two-pass configuration in which pump light reflects off of a reflector to produce additional gain. The reflector may be a Faraday rotator to minimize polarization-dependent pump effects.

6498677, Dec 24, 2002

Dec 5, 2000

09/729082

Yan Sun - Menlo Park CA
Jun Ye - Palo Alto CA

Onetta, Inc. - Sunnyvale CA

H04B 1012

3593414, 359177, 35933711

Optical amplifiers are provided for use in fiber-optic communications networks. Gain may be provided using one or more rare-earth-doped fiber coils such as erbium-doped fiber coils. The coils may be pumped by laser diodes or other suitable pumps. The optical output power of the pumps in a given amplifier may be controlled by a control unit. Taps may be used to monitor the power of optical signals being amplified by the amplifier. The tapped optical signals may be spectrally-filtered. The control unit may calculate the appropriate pump power for the pumps to supply to the fiber coils based on the measured spectrally-filtered optical signals. The gain of the amplifier may be maintained at a desired level using feedback control techniques. The gain spectrum of the amplifier need not be flat. A combination of feed-forward and feedback techniques may be used to calculate the pump power to be supplied by the pumps.

20140003112, Jan 2, 2014

Jun 28, 2012

13/535984

Yan SUN - Santa Clara CA, US

Broadcom Corporation - Irvine CA

G11C 15/00

365 4917

Methods, systems, and computer readable storage medium directed to efficiently storing value ranges in TCAM or other memory are disclosed. Storing a range of integer values in a memory includes determining a subrange within the range, so that, in a first and a second plurality of bit subsequences from binary representations respectively of a start value and an end value of the subrange, all except at most one bit subsequence in the first plurality is either equal in value to a corresponding bit subsequence in the second plurality or has a value of 0 and a corresponding bit subsequence of the second plurality has a maximum value. The storing a range of integer values in a memory further includes forming a first bit string based upon values of the first and second plurality of bit subsequences, and storing the first bit string in the memory.

20140050002, Feb 20, 2014

Aug 17, 2012

13/588918

Yan Sun - Santa Clara CA, US

Broadcom Corporation - Irvine CA

G11C 15/00

365 491

A system for ternary content addressable memory (TCAM) storage may include a TCAM having multiple entries and a processor that is communicatively coupled to the TCAM. The processor may be operative to receive a first numerical range and determine a first ternary representation of a second numerical range that encompasses the first numerical range. The processor may be further operative to determine a second ternary representation corresponding to at least one of a lower bound or an upper bound of the first numerical range. The processor may be further operative to store a combination of the first and second ternary representations in one of the entries of the TCAM. In one or more implementations, the numerical range may be a port range and the combination of the ternary representations may be stored in one of the entries of the TCAM as a portion of a packet classification rule.

56278527, May 6, 1997

Aug 16, 1995

8/515859

Yan Sun - Stanford CA
Daniel A. Francis - Palo Alto CA
Stephen A. Biellak - Palo Alto CA
Constance J. Chang-Hasnain - Stanford CA

The Board of Trustees of the Leland Stanford Junior University - Stanford CA

H01S 319
H01S 308

372 50

A semiconductor laser apparatus for broad-angle far-field addressing is disclosed. The apparatus comprises a laser block with lasing cavities. The lasing cavity mirrors are made by dry-etching of the semiconductor block. The width of a lasing cavity is defined by a p contact pad on the laser block; further lateral confinement of current to the cavity is achieved by proton implantation followed by etching of the proton layer. The apparatus achieves quasi-continuous beam steering with a total steering angle of 80. degree. and with 11 resolvable spots.

20190142559, May 16, 2019

Nov 10, 2017

15/809056

Yan SUN - SARATOGA CA, US

A61C 17/22
A61C 17/02
A61C 15/04
A61C 17/30

Disclosed are improved apparatus, structures and methods for tooth cleaning using mouthpiece appliance(s), water jets, brushes, and sonics/ultrasonics as shown and described.