I’m not speaking for LB, but many LB products are sold to interoperate with many other products, so I don’t see why you can’t link to non-LB products here.
The photodiode you reference may work with an oscilloscope, but the result may not be as square as using an IR Receiver module. LB has several of these, do a search for IR Receiver. They contain a preamplifier, and greatly increase range. Three pins; voltage supply, ground, and data output.
For decoding old remotes, you don’t need range, so I won’t go into the precise selection process.
Also, it can be much easier with an old remote to use two other methods of hooking up to oscilloscope;
- direct connection to the transmitter LED, using tack-soldered wires. This reads the voltage across the IR LED.
- direct connection to the battery terminals, using wires jammed between the battery terminals and the battery case. This reads the voltage drop, so you should invert the waveform. It works because of internal resistance of the battery.
For related kits; https://www.littlebird.com.au/products/sparkfun-wifi-ir-blaster-esp8266 is an ESP8266 CPU on a board with IR LED and receiver. For many situations, it can be used to extend an IR remote control service through WiFi. I was able to control one of my Daikin air conditioners with it.