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Do-Il Chang — 26 Patents

XCXtera Communications: 13 patents #2 of 57Top 4%

KAIST: 7 patents #1,829 of 11,619Top 20%

NLNeptune Subsea Ip Limited: 5 patents #2 of 12Top 20%

Allen, TX: #101 of 1,376 inventorsTop 8%

Texas: #4,879 of 125,132 inventorsTop 4%

Overall (All Time): #150,017 of 4,157,543Top 4%

26 Patents All Time

Do-Il Chang has been granted 26 US patents while listed as an inventor at Xtera Communications. The first was granted in 2000 and the most recent in November 2025. Do-Il Chang ranks #150,017 of 4,157,543 US inventors in our database (top 3.6%). Patent records list Do-Il Chang in Allen, TX, US.

Patents per Year

Issued Patents All Time

Showing 1–25 of 26 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12470222	Digital duty cycle calibration	Steven Ernest Finn, Dominic Yip	2025-11-11
10516477	Repeater OTDR using repeater based Raman pumps	Stephen Michael Webb, Wayne S. Pelouch, John G. Ellison	2019-12-24
10313020	Optical transmission system and related remote optically pumped amplifier (ROPA) and method	Philippe Perrier, Herve A. Fevrier	2019-06-04
9838136	Optical transmission system and related remote optically pumped amplifier (ROPA) and method	Philippe Perrier, Herve A. Fevrier	2017-12-05
9831943	Repeater OTDR using repeater based raman pumps	Stephen Michael Webb, Wayne S. Pelouch, John G. Ellison	2017-11-28
9735532	Multi-span optical communications link having remote optically pumped amplifier	Wayne S. Pelouch	2017-08-15
9461437	Tilt control through optical pump power adjustment	Wayne S. Pelouch, Stephen Michael Webb	2016-10-04	$398,000
8380069	Introduction-side dispersion shifting of channels	Wayne S. Pelouch	2013-02-19
8380068	Distinct dispersion compensation for coherent channels	Wayne S. Pelouch	2013-02-19
8233216	Optical amplifier bandwidth alteration	Wayne S. Pelouch, Herve A. Fevrier	2012-07-31
8228598	Optical amplifier with Raman and rare-earth-doped fiber amplifier both pumped efficiently using direct and reflected pump light	Wayne S. Pelouch, Herve A. Fevrier	2012-07-24
8145062	Optical amplifier capable of amplifying optical signals that traverse separate transmission fibers	Wayne S. Pelouch, Herve A. Fevrier	2012-03-27
8111454	Optical communication using shared optical pumps	Wayne S. Pelouch	2012-02-07
8111453	Submarine optical repeater	Wayne S. Pelouch	2012-02-07
7869673	Remote larger effective area optical fiber	Andrej B. Puc	2011-01-11
7742223	System and method for implementing a boosterless optical communication system	Andrej B. Puc, Andrzej Kaminski	2010-06-22
7665909	System and method for implementing a high capacity unrepeatered optical communication system	Philippe Perrier, Sergey Burtsev, Andrzej Kaminski, Andrej B. Puc	2010-02-23
7567593	System and method for fractional Raman order pumping in optical communication systems	Herve A. Fevrier, Andrej B. Puc, Andrzej Kaminski	2009-07-28
7336869	System and method for implementing a high capacity unrepeatered optical communication system	Philippe Perrier, Sergey Burtsev, Andrzej Kaminski, Andrej B. Puc	2008-02-26
6560247	Dual wavelength optical fiber laser	Min Yong Jeon, Kyong Hon Kim	2003-05-06
6560251	Mode-locked laser stabilizing apparatus and method thereof	Min Yong Jeon, Hak Kyu Lee, Dong Sung Lim, Joon Tae Ahn, Kyong Hon Kim	2003-05-06
6556596	Apparatus for generating an optical fiber laser capable of tuning a wavelength thereof	Ho-Young Kim, Hak Kyu Lee, Kyong Hon Kim	2003-04-29
6538804	Planar waveguide-type optical amplifier switch	Kyong Hon Kim, Yong Gyu Choi, Hak Kyu Lee, Min Yong Jeon, Joon Tae Ahn +2 more	2003-03-25
6426965	Optical fiber cascaded Raman laser scheme	Min Yong Jeon, Hak Kyu Lee, Kyong Hon Kim	2002-07-30
6385216	Optical fiber mode-locked laser	Ho-Young Kim, Kyong Hon Kim, Min Yong Jeon	2002-05-07