Patent ID: 11876347
Assignee: INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCES
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 4:
5. A broadband tuning method, comprising:
S1, tuning first light source through a first forward grating region, a first backward grating region and a first phase region to obtain a tuned first light source, and tuning a second light source through a second forward grating region, a second backward grating region and a second phase region to obtain a tuned second light source;
S2, amplifying the tuned first light source in the step S1 and turning on or turning off the tuned first light source by a first light amplification region, and amplifying the tuned second light source in the step S1 and turning on or turning off the tuned second light source by a second light amplification region;
S3, gathering light, that is output by an amplified first light source and an amplified second light source in the step S2, by a first optical lens and a second optical lens, respectively, so that the gathered light output by two light sources passes through an optical isolator and a third optical lens; and
S4, coupling the light output by the amplified first light source and the amplified second light source and converged in the step S3 into an optical fiber; and
wherein the first forward grating region and the first backward grating region are tuned such that during operation a first chip emits in a C-band with a frequency of 1529.16-1567.13 nm, the second forward grating region and the second backward grating region are tuned such that during operation a second chip emits in a L-band with a frequency of 1570.01-1610.06 nm in wide range,
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 L-band,
wherein a length of each of the optical isolator and the third optical lens is N times 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 and a first gain region, and the second chip further comprises: a second modulator and a second gain 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 a 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 a 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.