Peng Yun Chen

US Patent:

20200292839, Sep 17, 2020

Filed:

Dec 4, 2019

Appl. No.:

16/702639

Inventors:

- Cupertino CA, US
Ahmed Rashid - San Francisco CA, US
Colleen F. Mischke - Sunnyvale CA, US
Peng Chen - Fremont CA, US
Talisa Mohammad Nejad - Cupertino CA, US
Xiao Hu - Cupertino CA, US
Yazan Z. Alnahhas - Mountain View CA, US

International Classification:

G02B 27/42
G01R 27/26

Abstract:

An optical module includes an enclosure and an optical output assembly mounted on the enclosure. An emitter mounted in the enclosure is configured to emit a beam of light toward the optical output assembly. A connector, which includes two conductive layers separated by a dielectric layer, has a first side connected to the enclosure and a second side connected to the optical output assembly. An electrical trace disposed on the enclosure is connected to the first side of the connector so as to define a test circuit having a capacitance. Control circuitry is coupled to sense the capacitance of the test circuit, and configured to inhibit operation of the emitter upon sensing a change in the capacitance that exceeds a predetermined threshold.