US 11,791,608 B2
Compact highly-stable synthesized RF sources using self mode-locked beat-notes of multi-modes lasers
Afshin S. Daryoush, Bryn Mawr, PA (US); and Tianchi Sun, Philadelphia, PA (US)
Assigned to Drexel University, Philadelphia, PA (US)
Appl. No. 16/757,786
Filed by Drexel University, Philadelphia, PA (US)
PCT Filed Oct. 23, 2018, PCT No. PCT/US2018/057188
§ 371(c)(1), (2) Date Apr. 21, 2020,
PCT Pub. No. WO2019/084069, PCT Pub. Date May 2, 2019.
Claims priority of provisional application 62/576,398, filed on Oct. 24, 2017.
Prior Publication US 2021/0226416 A1, Jul. 22, 2021
Int. Cl. H01S 5/065 (2006.01); H01S 5/026 (2006.01); H01S 5/068 (2006.01); H01S 5/125 (2006.01); H01S 5/343 (2006.01); H01S 5/40 (2006.01)
CPC H01S 5/0657 (2013.01) [H01S 5/026 (2013.01); H01S 5/06821 (2013.01); H01S 5/125 (2013.01); H01S 5/34306 (2013.01); H01S 5/4068 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A distributed Bragg reflector (DBR] based multi-mode laser having mode-locking capability to build a frequency stabilized and tunable RF signal generator comprises: a distributed Bragg reflector (DBR] used as a filter to select laser output frequency; a gain medium;
a phase tuning section; and
an electro-absorption amplitude modulator;
wherein more than one multi-mode lasers share the DBR reflector;
wherein the gain medium is designed using InGaAsP—InAsP multi quantum well structure for operation at about 1550 nm, where a threshold current of about 30 mA is estimated for multi-mode lasers using 7 wells of 5-7 nm wide and gain section length of 500 um to 1500 um.