Need help with 1.6W driver

Hi, I am new to this community. I need a lil help on a 1.6W driver

I tried and kinda failed at building a laser driver, mainly because I went off google images which was a bad idea. But basically I got this 1.6W Blue laser diode I want to make a driver for. I tried using an LM317 regulator but I have no idea how to control both current and voltage with potentiometers. (I google-imaged "laser driver" and built the first image that came up)

For some reason, when I applied nonconductive heatsink grease to the back of the LM317 and bolted it onto an aluminium heatsink, the voltage and current dropped a ton. No idea whats going on please explain :wtf::cryyy:

I'm going to rebuild it though because I lost the PCB it was on.

Details of diode:
Osram 450nm 1 6W Blue Laser Diode 5 6mm Brand NEW 1 PCS | eBay

http://www.osram-os.com/Graphics/XPi...L%20TB450B.pdf

- OSRAM 450nm 1.6W Blue Laser Diode/5.6mm/Brand New
- I want to base it on a 9v battery if possible
- Threshold Current – Min: -- Typ: 0.2 max: 0.3 A
- Optical output power Min: 1.3 Typ: 1.6 max: -- W
- Operating Current: Min: -- Typ: 1.2 Max: 1.5 A
- Operating Voltage: Min: -- Typ: 4.8 Max: 6 V
Theres a ton more info and graphs on the osram data sheet

So basically I guess I need a circuit that delivers 4.8V at 1.2A

That sounds like a lot of amps so I doubt a 9v battery would cut it...

I'd like to know what parts and values I need and a circuit diagram, if possible.
I have an Aixiz case to hold the diode, heatsink and heatsink for LM317.

I'd appreciate the f*ck out of whoever helps me.

Thanks!!

Sincerely, Jia Jia
www.youtube.com/2Sneaky4You