I have 2 meraki switches using fiber optic interconnect but they are not connected, but the red light can be seen through the laser pointer test.
2 * MERAKI MS120-24
2 * SFP+ Transceiver, 10G LC Single Mode Module 1310nm
1 * SingleMode LC to LC Fiber Patch Cable Optical Cables Duplex 1G/10GB SMF Fiber Jumper LSZH Patch Cords 9/125µm, 250ft