Hi,
Nine weeks old is a wonderful age; full of energy and raring to go. I am not a Vet; just a dog lover for over 50 yrs, and a dog owner.
The puppy is so full of energy, and being in a different place, wants to explore all he can, and may not feel that comfortable with being inside there.
Your other answer about having some toys to play with is good.
Here are two links which might help some with this. Have you considered a Crate (or small cage) to use at work? You are absolutely right about not being able to get any work done!
http://www.leerburg.com/housebrk.htm
Very good information, with info on crate use
http://www.canismajor.com/dog/crate2.html
Tips on Crate Training.
Sometimes, feelings are, "I don't want to put my puppy in a cage", but crates are for that. It might work for him. I do wish you and him the very best, and have a good time with him.