How to get the link of a photo uploaded using facebook graph api

Question

I have successfully uploaded a photo to user's album using following code

      $data = [
        'message' => 'My awesome photo upload example.',
        'source' => $fb->fileToUpload($merged_picture_path),
      ];

      try {
        // Returns a `Facebook\FacebookResponse` object
        $response = $fb->post('/me/photos', $data, $accessToken);
        //print_r($response);
       // echo "Posted with id: " . $response->getProperty('id');
      } catch(Facebook\Exceptions\FacebookResponseException $e) {
        echo 'Graph returned an error: ' . $e->getMessage();
        exit;
      } catch(Facebook\Exceptions\FacebookSDKException $e) {
        echo 'Facebook SDK returned an error: ' . $e->getMessage();
        exit;
      }

Now I want to retrieve the link to this image.For that I retrieved the id of this photo

      $graphNode = $response->getGraphNode();
      $photo_id=$graphNode->getProperty('id');

Using this id I try to get the link to this image as follow.

      try {
        $pictue = $fb->get('/'.$photo_id);
        print_r($pictue);
        header("Location: ".$pictue->getProperty('link')."&makeprofile=1");
      }

But I am unable to receive the link since $fb->get('/'.$photo_id); does not return this link.

Please tell me how to get this link to the uploaded image using its id