I am trying to find out wether population growth impinges economic development or development in general or wether population growth is contributes to the achivement of development .
In addition to Peter Palms good explanations: it is good if leads to increasing of employed labor force (rather than pensioners and unemployed), i.e. if labor force is supported by other resources: natural (including land, water, and others) resources, professional education/training, capitals and wise governmental financial, emission and credit policy involving avoidance of growing credit dependance of international/foreign financial institutes
This is a huge question, to which thousands of papers have been devoted. Hard to answer in a few lines. It depends on the historical conditions and stages of development one refers to. To my opinion, the best and more convincing shortcut to start with is Oded Galor's (and colleagues') Unified Growth Theory.
Don't forget to specify what you mean by populaton growth. In developed countries the reduction of mortality rates during old age has recently contributed positively to the size of populations, but not to GDP.
The link between population growth and development is very complex. It is shaped by a host of factors. Economic condition, political stability and amount of resources in an economy play vital role in shaping the link between population growth and development.