For Juniper Networks devices that support AOC fibers, when using QSFP28-100G-AOC cables output power is not reported.

The following information is shown when requesting the diagnostics optics.

user@switch> show interfaces diagnostics optics et-x/x/x |match "Laser output power"

Laser output power high alarm threshold : Not supported
Laser output power low alarm threshold : Not supported
Laser output power high warning threshold : Not supported
Laser output power low warning threshold : Not supported
Laser output power : 0.000 mW / - Inf dBm
Laser output power : 0.000 mW / - Inf dBm
Laser output power : 0.000 mW / - Inf dBm
Laser output power : 0.000 mW / - Inf dBm  --------------- > **** value is 0

QSFP-AOC Tx power monitoring disabled is by design, this is expected.