This document helps to identify Transceiver vendor name.
"show chassis pic fpc-slot slot-number pic-slot slot-number" gives information about Xcvr vendor—Transceiver vendor name.
LAB_ptx10003> show chassis pic fpc-slot 1 pic-slot 1
Mar 29 04:10:05
FPC slot 1, PIC slot 1 information:
Type 4x400G/10x200G/20x100G
State Online
PIC version 255.09
Uptime 197 days, 23 hours, 40 minutes, 53 seconds
PIC port information:
Fiber Xcvr vendor Wave- Xcvr JNPR
Port Cable type type Xcvr vendor part number length Firmware Rev
5 100GBASE LR4 T2 SM JUNIPER-1W1 1XXXXX 1302 nm 0.0 REV 01
6 100GBASE LR4 T2 SM JUNIPER-1F3 1XXXXX 1302 nm 0.0 REV 01 >>>>>>>>>Juniper vendor
7 100GBASE LR4 SM OEM QSFPXXXXX 1310 nm 0.0 REV LR >>>>>>>>> Non-juniper vendor
8 100GBASE LR4 T2 SM PROLABS JNP-QSFPXXXXXXX 1310 nm 0.0 REV 01
9 100GBASE LR4 T2 SM JUNIPER-1W1 1XXXXX 1302 nm 0.0 REV 01