Is my donor area depleted after my second FUE 2 weeks ago? (Photos)

Your donor area will always look "thinner" proportionate to the number of hairs taken out after a FUE harvesting surgery.  The hairs will NOT grow back from the donor area (where it was taken). You can have your surgeon exam the area to see if it is depleted.

4000 FUE grafts will result in some degree of donor depletion. This will be more noticeable with short hair.  My advice is to give the donor hair a little length, and the donor area will look much better.

Hi! harvesting of 4000 FUE grafts from the donor area is indeed quite a lot. The cosmetic outcome will probably be much better once your remaining hair in the donor area grows out. you can consider some medical treatment with minoxidil 5% also

From the pictures it looks like a bigger punch was used and that is why the area looks noticeably thinner.  There is a option for you called Micropigmentation that could camouflage the area and give the illusion that there is more hair in the donor area.  

A total of 4000 FUE should be just within your maximum limit before depletion occurs. However, it depends on the skill of the surgeon in spreading out the excision sites.

Unfortunately with larger number of grafts harvested using fue hairtransplant, donor depletion is possible. In your case your doctor ahould have warned you and explained this possibility. 

Donor area depletion is a reflection of your original donor density less the 4000 FUE grafts you had. The visual suggests that you have donor site depletion as well as the number of grafts