US 11,876,347 B2
Broadband tuning system and method
Wenhui Sun, Beijing (CN); Wei Chen, Beijing (CN); Nuannuan Shi, Beijing (CN); Ninghua Zhu, Beijing (CN); Ming Li, Beijing (CN); Xin Wang, Beijing (CN); Jinhua Bai, Beijing (CN); Haiqing Yuan, Beijing (CN); Wei Li, Beijing (CN); and Yu Liu, Beijing (CN)
Assigned to INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCES, Beijing (CN)
Filed by INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCES, Beijing (CN)
Filed on Dec. 29, 2020, as Appl. No. 17/136,379.
Claims priority of application No. 202010003695.4 (CN), filed on Jan. 2, 2020.
Prior Publication US 2021/0281044 A1, Sep. 9, 2021
Int. Cl. H01S 5/068 (2006.01); H01S 5/026 (2006.01); H01S 5/40 (2006.01); H01S 5/0625 (2006.01); H01S 5/125 (2006.01); H01S 5/00 (2006.01)
CPC H01S 5/068 (2013.01) [H01S 5/0064 (2013.01); H01S 5/026 (2013.01); H01S 5/06256 (2013.01); H01S 5/4012 (2013.01); H01S 5/4087 (2013.01); H01S 5/125 (2013.01); H01S 5/4031 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A broadband tuning system, comprising a first chip and a second chip, the first chip and the second chip being arranged symmetrically about a symmetry axis, wherein,
the first chip comprises a first light amplification region, a first forward grating region and a first backward grating region that are sequentially arranged in a first direction, wherein the first light amplification region is configured to amplify a first light source and to turn on or turn off the first light source, and the first forward grating region and the first backward grating region are configured to tune the first light source;
the second chip comprises a second light amplification region, a second forward grating region and a second backward grating region that are sequentially arranged in a second direction, wherein the second light amplification region is configured to amplify a second light source and to turn on or turn off the second light source, and the second forward grating region and the second backward grating region are configured to tune the second light source;
the second direction is parallel to the first direction; and
the first forward grating region and the first backward grating region are tuned such that during operation the first chip emits in a C-band with a frequency of 1529.16-1567.13 nm, and the second forward grating region and the second backward grating region are tuned such that during operation the second chip emits in a L-band with a frequency of 1570.01-1610.06 nm,
wherein the broadband tuning system further comprises:
a first optical lens, a second optical lens, an optical isolator, a third optical lens and an optical fiber,
wherein the third optical lens is configured to converge light output by the first light source and the second light source, and couple light of the C-band and the L-band,
wherein a length of each of the optical isolator and the third optical lens is N limes a length of the first optical lens, and N is an integer and equal to or more than two, so that the third optical lens converges two unidirectional parallel light beams output by the optical isolator at equal power,
wherein the first chip further comprises: a first modulator, a first gain region and a first phase region, and the second chip further comprises: a second modulator, a second gain region, and a second phase region, wherein the first modulator, the first light amplification region, the first forward grating region, the first gain region, the first phase region, and the first backward grating region are sequentially connected in the first direction, wherein the second modulator, the second light amplification region, the second forward grating region, the second gain region, the second phase region, and the second backward grating region are sequentially connected in the second direction,
wherein the first modulator and the second modulator are configured for high-frequency modulation of an output light of the first light source and the second light source, respectively, so that the first chip and the second chip emit in the C-band and the L-hand.