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"Thesis ini mengemukakan sistem deteksi jarak obyek menggunakan Laser HeNe. Sistim pengukuran jarak ini menggunakan sinar LASER HeNe sebagai media penghantar informasi, sedangkan obyeknya menggunakan dua jenis material yaitu : obyek yang memantulkan sinar sempurna ( memiliki koefisien refleksi tinggi ) dan obyek yang memantulkan sinar tidak sempurna ( memiliki koefisien refleksi rendah ). Sistim pengukur jarak ini dapat mendeteksi jarak sebuah obyek atau benda, pada jarak tertentu di alam terbuka maupun di dalam ruangan . Obyek yang digunakan pada penelitian ini adalah dua material yang dianggap mewakili semua benda yang ada, cermin pantul mewakili benda yang memantulkan cahaya sempurna dan layar pengamatan mewakili benda yang tidak memantulkan cahaya sempurna. Sistim pengukuran jarak ini dalam pengembangan lebih lanjut suatu alat khusus yang bernama THEODOLIT , alat yang biasa dapat melengkapi dipakai dalam pekerjaan bangunan (sipil), sehingga akan menghasilkan ketepatan dan ketelitian yang lebih baik."

"Telah dikerjakan sistem pengukuran ketinggian suatu tempat, dengan menggunakan laser HeNe. Sistim ini memanfaatkan spot sinar laser yang dikenakan pada posisi obyek tertentu yang ditangkap intensitasnya oleh teleskop dan pulsanya dibandingkan dengan pola referensi lainnya yang sudah diketahui. Hasilnya diperoleh lewat osiloskop dan dipakai untuk menghitung ketinggian spot dari permukaan tanah. Hasil pengukuran menunjukkan akurasi 95 % dengan kesalahan 4,75 %. Pengembangan lebih lanjut dari sistim yang dikerjakan ini, adalah Theodolit berbasiskan sinar laser."

"ABSTRACT

Probing of the atmospheric parameters have been done by many scientists since a century ago up to present with various techniques. A simple system of laser radar without using any collimated beam but a reflected mirror as transmitter and a small cassegranian type (10.5 an in diameter) telescope as receiving was constructed to investigate the relative Mie backscattering coefficient by utilizing a nitrogen laser as a light source in the range of measurement bellow 1 Km. The backscattered light received by the receiving telescope is converted into electric current by photomultiplier and is shown and known as "A scope" display on an oscilloscope. SNR of the signal from photomultiplier was increased by using a boxcar integrator and its output could be recorded with XY recorder."

"ABSTRACTLaser induced thin film production (LITFP) technique was employed for making plumbum (Pb) thin film by nitrogen laser deposition in miniature scale. The energy of nitrogen laser operated at 12.5 kv, 90 torr was 3.5 mj with 5 ns pulse duration, thus producing peak power at around 0.7 MW. Pb plasma of 1 cm diameter was generated in each laser bombardment, producing thin film above the glass substrate. The thin film characteristics were measured by means of their thickness and surface morphology using scanning electron microscope (SEM). It was proved that there was a linear relationship between the number of laser shots and film thickness."

"Kopling antara amplifier permukaan miring dan fiber taper lens-ended diselidiki secara teori. Penelitian teori didasarkan pada model gelombang bidang tiga dimensi yang dihitung melalui pergeseran fasa akibat permukaan iring. Kopling diselidiki berkenaan dengan parameter-parameter berkas dari pandu gelombang amplifier lens-ended, dan juga berkenaan dengan posisi fiber. Terjadinya rugi-rugi kopling karena permukaan miring dan karena variasi dari uji lens yang terbaik, rugi untuk permukaan miring 10° ditemukan lebih kecil dari 0.5 dB dibandingkan amplifier permukaan normal.

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The coupling between angled-facet amplifiers and tapered lens-ended fibers is investigated theoretically. The theoretical investigation is based on a three-dimensional plane wave model which accounts for the phase differences introduced by the angled facets. The coupling is investigated with respect to the beam parameters of the amplifier wave guids and the tapered lens-ended fiber, and also with respect to the fiber position. For optimized lens radii the excess loss for 0l0° facet angle is found to be less than 0.5 dB compared to a normal facet amplifier."

"ABSTRACTThe frequency dobled Rd: YAG laser (532 nm/10ns, 15mj/pulse) uses a pulsed, frequency dobled; which provides a monochromatic, energy source with extremely high peak power and to has capability to develop of latent fingerprint on various surface. In the porous surfaces, this laser to has superiority, the compared with the development another methods, like powder and chemical method in latent fingerprint development. The high peak power of the laser causes Palmar sweat: contain a variety compounds, among them amino acids, oils, enzymes, vitamins and other chemicals with in the print to fluoresce. Some latent fingerprints will fluoresce in their natural state during exposure to this laser energy. The natural state fluorescing prints make can be documented and recording by high-resolution TV cameras and monitor for maximum sensitivity. The next step, the compare latent fingerprints products with visible impression by comparable instruments, see patterns of the friction ridges and be found same amount of their galton detail. "

"The purpose of this reserach is to find out the influence of laser shooting to the ovaries stem of eye,ablation of crab's eye to the level of egg's maruty,the diameter of eggs and the number of eggs scylla serrata....."

"This book offers the reader a practical guide to the control and characterization of laser diode beams. Following a short introduction to the working principles of laser diodes, the book describes the basics of laser diode beams and beam propagation, including Zemax modeling of a Gaussian beam propagating through a lens. The core of the book is concerned with laser diode beam manipulations, collimating and focusing, circularization and astigmatism correction, coupling into a single mode optical fiber, diffractive optics and beam shaping, and manipulation of multi transverse mode beams. The final chapter of the book covers beam characterization methods, describing the measurement of spatial and spectral properties, including wavelength and linewidth measurement techniques. "