US 12,266,908 B2
Device including a multiple-wavelength vertical-cavity surface-emitting laser (VCSEL) array
Tracy Wotherspoon, Portskewett (GB); Daniel Graham, Bristol (GB); Robert Bowen, Caldicot (GB); and Mohsin Haji, London (GB)
Assigned to Microchip Technology Caldicot Limited, Caldicot (GB); and NPL Management Limited, Teddington (GB)
Filed by Microchip Technology Caldicot Limited, Caldicot Monmothshire (GB); and NPL Management Limited, Teddington Middlesex (GB)
Filed on Mar. 8, 2023, as Appl. No. 18/119,077.
Claims priority of provisional application 63/317,869, filed on Mar. 8, 2022.
Prior Publication US 2023/0291182 A1, Sep. 14, 2023
Int. Cl. H01S 5/42 (2006.01); G02B 27/30 (2006.01); H01S 5/00 (2006.01); H01S 5/02253 (2021.01); H01S 5/02315 (2021.01); H01S 5/042 (2006.01); H01S 5/40 (2006.01); G01R 33/032 (2006.01); G01S 3/781 (2006.01)
CPC H01S 5/423 (2013.01) [G02B 27/30 (2013.01); H01S 5/0014 (2013.01); H01S 5/005 (2013.01); H01S 5/02253 (2021.01); H01S 5/02315 (2021.01); H01S 5/0425 (2013.01); H01S 5/4006 (2013.01); G01R 33/032 (2013.01); G01S 3/781 (2013.01); H01S 2302/00 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A device, comprising:
a multiple-wavelength vertical-cavity surface-emitting laser (VCSEL) array provided on a common substrate and including:
a first VCSEL set including one or more first VCSEL to emit first VCSEL radiation at a pump laser wavelength; and
a second VCSEL set including one or more second VCSEL to emit second VCSEL radiation at a probe laser wavelength different than the pump laser wavelength;
upstream optics to (a) collimate the first VCSEL radiation emitted by the first VCSEL set and (b) collimate the second VCSEL radiation emitted by the second VCSEL set;
wherein the collimated first VCSEL radiation defines a pump laser, and the collimated second VCSEL radiation defines a probe laser distinct from the pump laser, such that the both pump laser and probe laser are provided by the VCSEL array provided on the common substrate;
a vapor cell to receive the collimated first VCSEL radiation defining the pump laser and the collimated second VCSEL radiation defining the probe laser and to provide an output beam as a function of the received collimated first VCSEL radiation defining the pump laser and collimated second VCSEL radiation defining the probe laser; and
measurement circuitry to analyze the output beam provided by the vapor cell.