Unlock instant, AI-driven research and patent intelligence for your innovation.

Distributed feedback plus reflection laser

A distributed feedback and laser technology, applied in lasers, laser components, semiconductor lasers, etc., can solve problems such as lag

Pending Publication Date: 2021-04-02
II VI DELAWARE INC
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some electroabsorption modulators have demonstrated capabilities approaching 60 GHz BW, the BW of directly modulated lasers (DMLs), such as directly modulated DFB lasers, has lagged by about 30 GHz

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Distributed feedback plus reflection laser
  • Distributed feedback plus reflection laser
  • Distributed feedback plus reflection laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Various aspects of example embodiments of the invention will now be described with reference to the accompanying drawings. It is to be understood that the drawings are diagrammatic and schematic representations of such example embodiments and are not limiting of the invention and are not necessarily drawn to scale.

[0023] This application is related to US Patent No. 10,063,032, issued August 28, 2018, which is incorporated herein by reference.

[0024] Embodiments described herein take advantage of detuned loading effects to improve the performance of DFB lasers by including a passive region with weak optical feedback in the DFB laser. The detuning loading effect will first be described in the context of a distributed Bragg reflector (DBR) laser, followed by a discussion of its applicability to DFB lasers.

[0025] figure 1 An example modulation spectrum 102 of an active region of a laser is shown relative to a DBR reflection profile 104 of the laser's DBR region ar...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
lengthaaaaaaaaaa
reflectanceaaaaaaaaaa
Login to View More

Abstract

A distributed feedback plus reflection (DFB+R) laser includes an active section, a passive section, a low reflection (LR) mirror, and an etalon. The active section includes a distributed feedback (DFB) grating and is configured to operate in a lasing mode. The passive section is coupled end to end with the active section. The LR mirror is formed on or in the passive section. The etalon includes aportion of the DFB grating, the passive section, and the LR mirror. The lasing mode of the active section is aligned to a long wavelength edge of a reflection peak of the etalon.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit and priority of U.S. Provisional Application No. 62 / 908,990, filed October 1, 2019, and U.S. Provisional Application No. 62 / 938,151, filed November 20, 2019. Application 62 / 908,990 and application 62 / 938,151 are hereby incorporated by reference. technical field [0003] Embodiments discussed herein relate to distributed feedback (DFB) lasers with weak optical feedback. Background technique [0004] Unless otherwise indicated herein, the materials described herein are not prior art to the claims in this application and are not admitted to be prior art by inclusion in this section. [0005] Lasers are useful in many applications. For example, lasers can be used in optical communications to transmit digital data across fiber optic networks. A laser can be modulated by a modulating signal, such as an electrical digital signal, to produce an optical signal for transmission over a fiber...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/125H01S5/00
CPCH01S5/125H01S5/0071H01S5/0287H01S5/06256H01S5/06258H01S5/1209H01S5/1225H01S5/1039H01S5/1021H01S5/0654H01S2301/02H01S5/0265H01S5/34H01S5/026H01S5/0427H01S5/124H01S5/141
Inventor 松井康浩
Owner II VI DELAWARE INC